Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea2361a943c717b0…

MALICIOUS

PDF

74.8 KB Created: 2021-06-18 22:33:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: afe6aeeab80481b3ec016f043a0e60c2 SHA-1: 0694ab872b1bc8d3ddc85416a3b5bc84f1c9c9df SHA-256: ea2361a943c717b080379bbb84a97b3af28f03f3895e8726c3d1428311151455
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/00cf815a21068939d34607c53955d0e8/pojede.pdf In PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/kbni2l0dir4c32bkjmi1de2364/jinepapijurakaz.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/b5f0312a83c14949d471b76730b118ce/14102174188.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/r1gi263bufb37qrgvopd0eo2q7/tasaginamazepejog.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2b9a166c7---kukuvuworovixozibinuvo.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/98463795712.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/3745a413f46a1861e3aae6c7aad82386/kerozadagigijo.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/85b6bf6ce5240097412dee87e4fcebe6/xasuletuwanexevuradelofes.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/6pph1os199okvhn1k1qmfp1pps/44638513399.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607c260259d46---36811870172.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/77e695c7671677a20bcb6c47a873e7ae/45656479096.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/84ca057efee4c826022c3cfe6ffe4337/fifuzotatunulet.pdfIn PDF document text
    • https://latework.cz/soubory/movawuki.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b961d4aa08---rupezovisisulufezuxeve.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/balogifuvedelutumojafu.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/17ea41ef5b8d7147a10263f4944d7d41/mipewuvuxarudosila.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/lrm65u2686briobdhato7tejdh/43217618206.pdfIn PDF document text
    • https://okna-stv.ru/userfiles/files/kakadewulo.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac2aaab334---82380330015.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=the+lion+king+full+movie+download+in+moviesdaPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31C 5388 bytes
SHA-256: 041998f791702fcae0d60d6d174ed6f46fb491fe297c86c93a916ecbebb07b53
font_01_sfnt_off0000f56b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56B 11512 bytes
SHA-256: ddcf3d594b047efceb7a49ea8ac5536f4c8b870bd0e1dbdac4b752fd6ffdf9cc