Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6b5e44e176b3ee7…

MALICIOUS

PDF

86.5 KB Created: 2021-09-07 07:02:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2218fd0f364e58c79565759e5b5869a0 SHA-1: 2f2dd092c843e34b752d89bd3a39ae5a127dfb12 SHA-256: a6b5e44e176b3ee709d4f5d90ff93fced399e007859e36820d1987fcc06cde30
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware hosting sites. The presence of embedded JavaScript suggests it may be used to further obfuscate the redirection or exploit PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 8

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1609915a380c0d---87038830034.pdf In PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/46cef92df75a589bfc65ac03d301df10/senifuluwomidafevi.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/1ka134udelnb1556929lh9ecim/misexavotigiko.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/wemuva.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/26886124019.pdfIn PDF document text
    • https://hanakspotrebice.cz/eshop/ckfinder/userfiles/files/bisat.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/59835022683.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f56a4b26dc---67045342762.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/e4312f042ca645ecad8604cc67f56595/nokafabo.pdfIn PDF document text
    • https://viettrungson.com/media//Files/kenemoximax.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/67879593334.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/sajifab.pdfIn PDF document text
    • http://charontrade.hu/data/file/91423005276.pdfIn PDF document text
    • http://janandpoos.com/clients/872640/File/merasoses.pdfIn PDF document text
    • http://careerpathrecruitment.com/swapscan/app/webroot/js/ckfinder/userfiles/files/fodawivesafixivozawobox.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/gizegumuzepizaniwunafafe.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca019cdb51---77967105621.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f558d045d---75486040017.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/kibinakofevadikidaxun.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/ji5cqo91ba50f59jcgeggqkdt2/94563189271.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/48539237388.pdfIn PDF document text
    • http://purofirstli.net/userfiles/file/42064228511.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=missing+addends+worksheets+3rd+gradePDF 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_off0000eec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000106d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D4 17584 bytes
SHA-256: 19e0062f4145f8d24af0940741eeb6dc9f1023c2758de1e3b769e237ccc6ab36
font_02_sfnt_off00013408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13408 10824 bytes
SHA-256: 053eec975e09ef8cb4a6ffb53302d183c8332228173df770a8fea618a5f61236

Open this report in the interactive analyzer, or submit your own file for analysis.