Malicious PDF — malware analysis report

Static analysis result for SHA-256 f29122a41018c052…

MALICIOUS

PDF

95.3 KB Created: 2021-07-21 08:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1490caab001ad680115b0ddbf08dcb81 SHA-1: a64f69aed58be5b32f29555be5298872ccbe2e83 SHA-256: f29122a41018c052095967eca59195a9082ddb8afd2cbfb4e049526b070bf620
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress upload directories, suggesting it's used to distribute malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, with the latter identifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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.
  • 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.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbaf99118d---94799738009.pdf In PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac04df8215e---21077529406.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16075b89571f7b---wolafobofekizizuvasati.pdfIn PDF document text
    • http://stinpo.com/ckfinder/userfiles/files/timotiripejabakivavixoj.pdfIn PDF document text
    • https://www.hermanosvalerorecio.com//ckfinder/userfiles/files/kadadexise.pdfIn PDF document text
    • http://sangiorgioautoservizi.com/userfiles/files/21775451839.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/gegazanimidek.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/23982847756.pdfIn PDF document text
    • http://climtech.com/files/files/16855793464.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/49378090930.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/427da906e26a453565d9f0f6d80bb25f/39576406017.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d23e16e7853---1997344059.pdfIn PDF document text
    • http://allasclub.com/campannas/file/jipawinenir.pdfIn PDF document text
    • http://jghsclass75.com/clients/f/f3/f322050927ea28328664fd088939ffaa/File/goromawosapususudejes.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/19igl32p778mr48im90uhcc9h3/nilaker.pdfIn PDF document text
    • http://laulumaja.fi/ckfinder/userfiles/files/bajimenedusatijerozit.pdfIn PDF document text
    • https://zhbiotech.com/CKEdit/upload/files/boxuludokef.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/eb2e94ef3d894118b86282d0a9f297f9/sinebisisateponotuwafi.pdfIn PDF document text
    • http://szentistvanpatika.hu/upload/file/wopufufokob.pdfIn PDF document text
    • https://nguoixunghekiev.vn/userfiles/file/pisuxazovunetiso.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/jjaq2edia329modf34lqmtfh61/fiwadofufamebesasogewo.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/66924024174.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/55c076af28ea61e51a361fe4dbc52e8d/xepexamerovezugoteligeme.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=watch+pinoy+tv+online+freePDF 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_off0001124f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124F 10580 bytes
SHA-256: 302ffbded7e2dd9d9f76744ad82b646faaf74b5f9cd723442ed93a54db479f10
font_01_sfnt_off00012a75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A75 17596 bytes
SHA-256: 6b97bc70cab88d985878f82e8d3fba24357de26427ecaf567615ff0f2a62481f
font_02_sfnt_off0001583a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1583A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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