Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ba87503f647dae…

MALICIOUS

PDF

90.7 KB Created: 2021-08-14 15:36:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b8fd7f5cdd3b1c45bd40a9aeb2a3aff2 SHA-1: 6f56bb4f4e23bfff649f4edd2692eaa0fae93f32 SHA-256: 02ba87503f647daef118ff5a5725e0056e42e81280da402be8df0eec8ebc1a59
164 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 distribution sites. The presence of embedded JS suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • 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://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/4d73052ce23a80324860bded37d25b6d/jowaxo.pdf In PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/f653d8db9f21d4a541919a7b00982df2/21823494668.pdfIn PDF document text
    • http://goraku-sangyo.com/userfiles/file/96584840019.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e349a6ea762---5303262711.pdfIn PDF document text
    • http://mytmbc.org/fckimage/file/lugigaxenalir.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/67m854aukg66do2g5jihnj7s5o/xisemi.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/75dd7cb2abee2bc43473c3eae9ce5a58/nojito.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/jt1lvub2jiuhoa2m93re0vj8ga/91627365448.pdfIn PDF document text
    • http://nagakuratrading.com/js/upload/files/1347793789.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/majazidovisota.pdfIn PDF document text
    • http://sbstroy53.ru/img/files/7770683313.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/2e9f413766fc77419e210fae3d5c3a82/56671762003.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f8ed2195832---bewunikofumadanonizowu.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/1608497802.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/5b27a5905e80b6fb3acf4ffab510ae29/84552828636.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607c224aa35df---lojifabusekoze.pdfIn PDF document text
    • http://kondicionery-fryazino.ru/upload_picture/file/76505115574.pdfIn PDF document text
    • http://jingyitech.com/uploadfile/xebufibu.pdfIn PDF document text
    • https://angkagenap.com/contents//files/12550124529.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/mukiwiwawarakol.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9138e42b66---86611476232.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/95662381223.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=2017+taylormade+m2+driver+adjustment+manualPDF 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_off0000f84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84F 19052 bytes
SHA-256: 62bdff598cf9fab5fcd7f6b30b5be621136a49d569c921b30379837f6183b7fa
font_01_sfnt_off00012a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A88 11064 bytes
SHA-256: 2f4a0ad4717d82549d62e3dbd4d7ab670f63ff9606a11bea3e3dda3808b0f279
font_02_sfnt_off0001446e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1446E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1