Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce7042ec9abb1ff…

MALICIOUS

PDF

79.7 KB Created: 2021-05-10 13:45:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 397d9fcf2b50d28fad84f14dba6faeab SHA-1: f8b38e9a31927f43b7064fb75fc2fbd0495ca10d SHA-256: 0ce7042ec9abb1ffd251156a63a8ab69e4922a8b30c6fe2c52b068f45f6c9f96
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many pointing to disposable domains, characteristic of a link farm designed to redirect users. The primary malicious activity appears to be the redirection of users to external URLs, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/strik?utm_term=the+canterville+ghost+castle PDF link annotation
    • https://cdn.sqhk.co/gusiloxi/iZjgghg/41415129846.pdfIn PDF document text
    • https://sunarikibuniteg.weebly.com/uploads/1/3/1/3/131381519/kapamob_vuwikipisozobu_gibiruxa.pdfIn PDF document text
    • https://jerepukiw.weebly.com/uploads/1/3/2/6/132681878/400ff52d.pdfIn PDF document text
    • https://xidokuwu.weebly.com/uploads/1/3/1/4/131453793/ginogebujin.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/bgjjiye/air_attack_2014.pdfIn PDF document text
    • https://goxanakevixi.weebly.com/uploads/1/3/4/8/134857001/lafitanawal.pdfIn PDF document text
    • https://cdn.sqhk.co/baxotonad/ahaJqaD/fudoruvupamatoki.pdfIn PDF document text
    • https://tosofeguwus.weebly.com/uploads/1/3/4/3/134321705/8015646.pdfIn PDF document text
    • https://cdn.sqhk.co/zelosoza/igihMjc/58880086081.pdfIn PDF document text
    • http://tujukesabegakom.mygamesonline.org/lesion_del_nervio_ciatico_tratamiento.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://katetagozu.epizy.com/28139489772.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f159a86e-a10b-4fb2-8d20-103f76fb14c7/zekuwujabinu.pdfIn PDF document text
    • http://wobetaledofekur.rf.gd/69645374425.pdfIn PDF document text
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_aa86dc8790dd4153b118ed1ca264b8a2.pdf?index=trueIn PDF document text
    • http://fepexajimejisim.epizy.com/56288084385.pdfIn PDF document text
    • http://zijemuviwovo.rf.gd/43048984776.pdfIn PDF document text
    • http://pebomotixot.myartsonline.com/breakthrough_plus_3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a42fa612-4256-49f4-b681-60f50ffc430c/kilenufivevawodipopib.pdfIn PDF document text
    • https://368051e9-4199-40ea-b9a2-dc6e6f83cb3b.filesusr.com/ugd/6260fe_47e43944437f40c19e6692725a5234a5.pdf?index=trueIn PDF document text
    • https://cb0920a4-0dfc-4587-8161-bd3bf883b043.filesusr.com/ugd/df391a_6e4c56c300e34744927cb67ec0105d83.pdf?index=trueIn PDF document text
    • https://36535336-4f9e-4c0a-b1ad-3385cb5d4299.filesusr.com/ugd/15ebe2_4e978fbb677d4b2b916237be534a000e.pdf?index=trueIn PDF document text
    • http://jefesati.rf.gd/metabolismo_del_grupo_hemo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aedbf86-5772-4147-9e9a-4094d7e07e17/tabela_fator_de_correo_inss.pdfIn PDF document text
    • http://pigutun.myartsonline.com/60055094038.pdfIn PDF document text
    • https://ee42ee57-4547-4a8c-8a66-6cccb7f6869d.filesusr.com/ugd/2a9ad2_b501476d47df46cfb5998fc96bff8bc2.pdf?index=trueIn PDF document text
    • http://tiwatimab.atwebpages.com/american_dream_in_death_of_a_salesman_research_paper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b6b6525-8102-4d72-ad04-52222999e4a9/59609899594.pdfIn PDF document text
    • 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_off0000fcb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB2 5072 bytes
SHA-256: 5220f6193b689b52be8d6a97b6779c21a98eff7592ee16693cbe0c05922a6218
font_01_sfnt_off00010df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF6 10380 bytes
SHA-256: 41b479992b30c64938c5f0e2bd214b1c73f41f3f9cf8a80617e69245c254fcc6