Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0e0086ff67431af…

MALICIOUS

PDF

84.8 KB Created: 2021-09-06 22:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 86c6d3a54751c3a9cc49e7a95eed4d1b SHA-1: a42f5b34ca7feb59bc188b7fabdfac824244255d SHA-256: f0e0086ff67431af7d45708d7dcad6cd24c7581149dc43032558260ecbfc2fa0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vansuloi.com/uploads/userfiles/file/27653700732.pdf In PDF document text
    • https://haysalon.com/public_html/userfiles/file/41941649760.pdfIn PDF document text
    • http://haohanlegend.com/Uploadfiles/files/4400992741.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612cbce7b2664---36062304969.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/318a03ba831d2d9735fd4ab746a4d512/43450087141.pdfIn PDF document text
    • http://rafaelstore.ru/upload/files/bupavojedelipinewe.pdfIn PDF document text
    • http://trieuduong.com/images/Download/nelun.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/tuzarapuzewalegu.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0fc363da5---83313334501.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/339cc4d0ffd3305058f33309ec4b4ad1/67678749546.pdfIn PDF document text
    • http://atek-ent.com/upload/file/mesaripewojodinogoruna.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/saworot.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/ropesenuli.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/jfheqtk7mmb8qaoshl2kcsg043/zajinodapegipomero.pdfIn PDF document text
    • http://devison-matras.ru/upload/file/5338858340.pdfIn PDF document text
    • https://anfauglir.com/images/file/91983348700.pdfIn PDF document text
    • https://www.retake.dk/ckfinder/userfiles/files/28072479245.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/de6e23d5d0e7932140ef8a11cf40c2cc/tozukijirumajol.pdfIn PDF document text
    • http://ouhkpthaa.org/userfiles/48555623201.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/e3377e103f0d0dcf72a5639b9556b5eb/21415334245.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/manikojodozadonuz.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/og47f0qfj6sjp9ui1upuq658j6/56086855309.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210618022414.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=oxford+dictionary+english+to+urdu+free+download+2015+pdfPDF 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_off0000e2c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C2 17640 bytes
SHA-256: 57d9c94e4291863824b247ac517fff6ff00c3dbe90ff75330d1ddc9059d1d359
font_01_sfnt_off000110e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E7 11756 bytes
SHA-256: 894a57567be8b6604d6526787f4639405b418e7d236512378a64e8968b4f1677
font_02_sfnt_off00012ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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