Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7f5415d60fc2b2e…

MALICIOUS

PDF

91.4 KB Created: 2021-07-20 02:02:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ce9b58e093dc57875265670ff47fe63f SHA-1: 3e90d8f475529913bb07728d5ef764c9da83df52 SHA-256: b7f5415d60fc2b2e6dd2a4527e9382f0ed5412200928e50b3d3c47d26b31b8f9
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_CALLBACK_LURE' heuristic suggests the document attempts to trick users into calling a phone number under the guise of a billing or security issue, a common tactic in callback phishing and tech-support scams. The presence of embedded JavaScript and the 'SE_CLICKFIX' heuristic, which indicates instructions to run commands, further support the malicious nature of the file, likely involving exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae36dbb47a---48384085172.pdf In PDF document text
    • http://broadmoor77.com/clients/39738/File/69790529658.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/30963c3026e324b6c457a7b691297aa9/32649803298.pdfIn PDF document text
    • https://vresponse.net/userfiles/file/68764524186.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/megeriwepomawom.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/737ad61847cd9a67fedcc42b43f5ba05/tivaletelokudawazopo.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/8dqjham68ked9mup9jfe8jtfj4/50479962529.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3c608611f---16714959524.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/38d7ae3dc8215da30348cabb03c39d46/12341863391.pdfIn PDF document text
    • http://tanabuauto.com/js/upload/files/59199090366.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/22866568208.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/b5d0bb6653e91814db705cfe3556a8ea/sawibojabani.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/rukazolidetoka.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bab7ee160a2---89039594830.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd64332867---dovabe.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/43635ad64b4726ca84580e22e5a214b5/61748956253.pdfIn PDF document text
    • http://d4svancouver.com/clients/c/c8/c8601140a4283eb9b700f388a83987a3/File/zosiv.pdfIn PDF document text
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/71293562123.pdfIn PDF document text
    • http://slsnn.ru/content/file/bovafetidebanodelopi.pdfIn PDF document text
    • http://yetisirkaucuk.com/firma/files/52133141266.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609851517b623---xuzukusefomeviv.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/5340b5f7ef0485849260a3c21702eea9/76090363253.pdfIn PDF document text
    • http://ebonit.light.bg/includes/libs/ckfinder/userfiles/files/23059589879.pdfIn PDF document text
    • http://mnwebdesign.dk/userfiles/file/vidubaxipanilaguzofel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=business+pitching+templatePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10159 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11970 10756 bytes
SHA-256: f0d25ca4f5a17344b91c154b0ba15e7752289ee2dc88b48147fe722f4f25286e
font_02_sfnt_off00013202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13202 17752 bytes
SHA-256: 255fe9413977365cc6b818370f8b64b03aca4eb67a1bf5c1b3db23734f433ec8

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