Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9efaf42d4cd31e…

MALICIOUS

PDF

81.5 KB Created: 2021-09-14 02:32:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 417e7bbb3d05261646231b927413f824 SHA-1: adf5551bef86b98989a5a535451bb1e9221824c6 SHA-256: ed9efaf42d4cd31eabb955bcb2a9c941838c6e7af20062d09d5ba57c601041de
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to disposable hosting domains, a common tactic for phishing and scam operations. The 'SE_CALLBACK_LURE' heuristic indicates the document likely prompts the user to call a phone number, consistent with callback phishing. ClamAV detection and ML classification further support its malicious nature, suggesting it's a phishing document designed to trick users into fraudulent phone calls.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://kadh.kr/bobod/upload/file/81450419026.pdf In PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dfcdcce766---23404726685.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/36912834542.pdfIn PDF document text
    • http://i-p-p-c.com/ckfinder/userfiles/files/powupitogulefegap.pdfIn PDF document text
    • http://addon-colsman.somantec.net/ckfinder/userfiles/files/sadarinew.pdfIn PDF document text
    • http://standartbio.com/fckfiles/file/vuvekejapu.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/raginasazabosufugov.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139c5ee4d775---53605674794.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/66mbao29tg3mefagb5es7n682i/67905063633.pdfIn PDF document text
    • http://wwm-quanta.com/upload/files/tukodomobiz.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/74926300798.pdfIn PDF document text
    • http://aallergy.friend-match.com/upload/files/73253676822.pdfIn PDF document text
    • https://apc-algercentre.dz/ckfinder/userfiles/files/44724652220.pdfIn PDF document text
    • http://precisionsurgicalworks.com/alpha/ckfinder/userfiles/files/luboniwiweriwuxik.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613d6f03ea581---10294464144.pdfIn PDF document text
    • http://www.kymenhome-etsinta.net/tiedostot/files/68511935822.pdfIn PDF document text
    • http://krukewittfarms.com/userfiles/file/reniwigatus.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/palovisavuda.pdfIn PDF document text
    • https://xn--23-6kci4asohe8k.xn--p1ai/userfiles/file/58900103473.pdfIn PDF document text
    • http://www.boldino-hotel.com/ckfinder/userfiles/files/73571038569.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef9c7ba87b---vibawiwamexolofemaxuxodej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=dream+league+soccer+online+gamePDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/078d8ec64dc19db23949f03b1abd5598/64925752151.pdfIn PDF document text
    • 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_off0000daee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEE 18132 bytes
SHA-256: 3da5935af3a3f17f60c036b2748dc3002ae0b791314de86db3114b5262b5279a
font_01_sfnt_off000108de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DE 10576 bytes
SHA-256: 00d4c39f63aed3583660e9c6e63f89f80686085b27894702262d0c6045e96f29
font_02_sfnt_off000120f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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