Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eac08b46b930980…

MALICIOUS

PDF

78.6 KB Created: 2021-07-17 14:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 13c9c382078db6df63630be62f43c3cd SHA-1: a29d3813591fdfeca554403bcc2bc2ba7994ebd5 SHA-256: 1eac08b46b930980bf52aafc7dc94b60c00ce437a550486686e65a14b353fa1e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://yuha.be/_files/file/medapetofafevinajideb.pdf
    • http://asu78.ru/userfiles/file/65223151403.pdf
    • http://alnoorcity.com/userfiles/file/25047062138.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/ss3gua1707q88cotnmt5754jt3/49494185656.pdf
    • http://linker-apps.com/files/vezisinepufutovijonu.pdf
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/sre9mcnivucmaoou4gtb5l1eft/95682573525.pdf
    • https://accuratesearch.com/userfiles/file/99580356964.pdf
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/94332811525.pdf
    • http://reikihaus.com/clients/75291/File/migezovofeginife.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608515fe13862---vekuxasezebulovinewelata.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/msvg04q1fmao9dm1cnt6c5raib/bagemadapozigusugesufolip.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/qqoetae938rcou9prdq9c0ben0/29819097434.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/ucoppllh6osg0obb4gufvhkie5/sajezudarefutufuzu.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc739b6a4b---63274347158.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/641aada94cabe89963d06d3585daa259/derivanemuzinajefirojo.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/48769085d108d283f464d075eb46a17a/wukupidob.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/60242af277efaddb59b72bf668e3b6e6/1534037653.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/t6gflhsg0kn1hm65hdpjsgvfs6/94478704314.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160755309988f1---zorumarunexuxikejon.pdf
    • http://hud101.vn/webroot/img/posts/files/74694193545.pdf
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/3c034ab2571a01dfe10476ab0971ff5d/nanatomawumofom.pdf
    • http://elitaliaweb.it/upload/file/30399885690.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b36d9ca0878---90155378678.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/dipv7uok5753d7rm8l4a7vebm2/pafizudapijaz.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=so+before+i+go
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0df.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DF 16792 bytes
font_01_sfnt_off0000e8f1.bin
1eadceb4ad04aded50a8e9e82668ab724cd040082f52a15681a804359de17a0b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F1 18292 bytes
font_02_sfnt_off000117a4.bin
48230eecb877ca7c6a119ed802857ec1eee45e5df9008e22bc0d959dfefed7df
pdf-font-stream PDF embedded font (sfnt) at offset 0x117A4 10028 bytes