Malicious PDF — malware analysis report

Static analysis result for SHA-256 426cb1ed3a0c060a…

MALICIOUS

PDF

94.6 KB Created: 2021-03-19 18:42:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 51f09dedccf5d743eb0299b1fe184325 SHA-1: 1d456a46ce34783ef5369f856d67c582b4f62513 SHA-256: 426cb1ed3a0c060aea9c87152b46bf6ad2afbc72b72deab89c016b05541f44a6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with many pointing to disposable hosting and exhibiting link farm characteristics, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://dugedepap.ru/award?keyword=hemorrhagic+cerebrovascular+event+pdf PDF link annotation
    • http://huseyincanx.com/what_is_the_etymology_of_oral_communication_in_businessvcejc.pdfIn PDF document text
    • http://dugules.iblogger.org/naked_statistics_summary.pdfIn PDF document text
    • https://bipozoxadedisaj.weebly.com/uploads/1/3/1/1/131164124/dabawuzakota.pdfIn PDF document text
    • http://byseles.xyz/698727043936j02v.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/jakasizewoxonijpu4c4.pdfIn PDF document text
    • http://mailedflkf.site/winufulirapekiwufujinpae1u.pdfIn PDF document text
    • http://keepxufi.space/dupont_corian_sheet_price5zl3o.pdfIn PDF document text
    • http://gk-kuban.ru/those_who_wait_on_the_lord_meaningsecfn.pdfIn PDF document text
    • https://gapurosudezejug.weebly.com/uploads/1/3/5/9/135965954/pofodenivopunow.pdfIn PDF document text
    • https://zimavilagapiwe.weebly.com/uploads/1/3/2/7/132712623/3937364.pdfIn PDF document text
    • https://nabidojanafo.weebly.com/uploads/1/3/4/4/134455463/9616448.pdfIn PDF document text
    • https://fegejakir.weebly.com/uploads/1/3/5/2/135299458/1888580.pdfIn PDF document text
    • http://pitushok.space/dapuzajegizofonozatakikohsh7h.pdfIn PDF document text
    • https://rixotojar.weebly.com/uploads/1/3/0/9/130969533/7c6e18b06b2.pdfIn PDF document text
    • http://giftcard-sale.store/ananda_vikatan_ebook_subscription0v9w5.pdfIn PDF document text
    • http://betflixguvenilirmi.com/rodimuvqr3k.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dilalixurapa.epizy.com/39637987236.pdfIn PDF document text
    • http://kefebewo.rf.gd/capitalism_socialism_and_democracy_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/90839511948.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/45559561518.pdfIn PDF document text
    • http://wuriwafu.epizy.com/50148306234.pdfIn PDF document text
    • http://buziluzune.epizy.com/43850319774.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/hindu_temple_powerpoint_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/30429833923.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/pupojoka.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_off00013326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13326 5728 bytes
SHA-256: 15bb0784e528dd42e703ddc9f890321802e99d52505a613e2cc1c5569a28663a
font_01_sfnt_off0001467e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1467E 11736 bytes
SHA-256: bfc938bc16f9f2f1c68f50f4ecda303dccd94d20d8952c96f00ab0e65850f8db

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