Malicious PDF — malware analysis report

Static analysis result for SHA-256 182993efaeeac166…

MALICIOUS

PDF

75.5 KB Created: 2021-03-14 14:11:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 6c06191ca8479a19bd3d657927ee1b14 SHA-1: bebf69ac72fab6bdcc68c78062a24277bd8d25b2 SHA-256: 182993efaeeac16609a647ca489846f074d8237c25157ff6ef5368ba012af88e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a significant number of external links, suggesting a link farm or phishing attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate that the primary function is to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://ponafet.ru/award?keyword=complemento+c3+y+c4+lupus+pdf PDF link annotation
    • https://minufufigazibur.weebly.com/uploads/1/3/4/5/134528603/towofelokubakalisi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376850/normal_5fd0e4ab8c0ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421461/normal_5ff5b9dec2997.pdfIn PDF document text
    • http://tufodudem.mypressonline.com/how_to_identify_transmission_dodge_ram.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426059/normal_5fd116e107ae9.pdfIn PDF document text
    • http://zuvalasit.mypressonline.com/57460407886.pdfIn PDF document text
    • https://pekixozere.weebly.com/uploads/1/3/5/3/135397988/givelakipaxupik_tebexok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497666/normal_604864bc5082c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369653/normal_6021f236ae700.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408983/normal_603ffc97c86d0.pdfIn PDF document text
    • http://xadexawufomovi.sportsontheweb.net/zelusifipar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380209/normal_60073856b0bd6.pdfIn PDF document text
    • https://zakiguranul.weebly.com/uploads/1/3/4/4/134480990/bifiga-gexagisuwifaka-ruvasofa-bozus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/ralol.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/74730077525.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/7079438012.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/latest_android_phones_2019_india.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/analise_informtica_telefone.pdfIn PDF document text
    • http://dakafatuvuguviz.atwebpages.com/application_deadline_for_texas_am_san_antonio.pdfIn PDF document text
    • http://gogujigasad.onlinewebshop.net/falobe.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_off0000e7c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C9 5252 bytes
SHA-256: e0937242c50575bbd45c303229a09b4a21325728aed55f4861ad815a38261b36
font_01_sfnt_off0000f9aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AA 11444 bytes
SHA-256: 4cb24cad240e92b19b26fee5ce7647d689b408ecc332356839f112c60a8c22bb

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