Malicious PDF — malware analysis report

Static analysis result for SHA-256 67516f2486555c04…

MALICIOUS

PDF

74.0 KB Created: 2021-03-01 19:17:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e0f2af5b69d1dfe3f57f2cff6b7323fb SHA-1: 644bed81024070efaa979032209f4ee83690e02a SHA-256: 67516f2486555c04cb1a849f4673c4bc63d5f782477719e66e11341cc8fd3692
126 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with one specifically pointing to 'bologen.ru' and appearing to be a search result lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting a phishing or malware distribution campaign. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/award?keyword=whirlpool+wtw5000dw1+lid+switch PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372072/normal_600bb0d68ad13.pdfIn PDF document text
    • http://grigolia-studio.ru/136653473053h07h.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/are_they_making_another_mortal_instruments_movie.pdfIn PDF document text
    • http://otshelnik.net/24055738322qgznf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492275/normal_603d16c18cbe8.pdfIn PDF document text
    • http://leziwazedo.mypressonline.com/terry_pratchett_discworld_series_collection.pdfIn PDF document text
    • http://vseti.life/happy_birthday_punjabi_song_djyoungsteryf8en.pdfIn PDF document text
    • http://reweder.site/daradezuxizunifamuvaxabel7w1lr.pdfIn PDF document text
    • http://ukrdomonis.xyz/15660470039hsbtf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416326/normal_60356e916d357.pdfIn PDF document text
    • http://mavito.online/8939386084wov1a.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/tinivukedeta/khalibali_song_djmaza.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/aqualung_i200_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/airbnb_style_guide_typescript.pdfIn PDF document text
    • http://sogivuwe.onlinewebshop.net/how_to_implement_baby_whisperer.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_off0000e696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE696 5372 bytes
SHA-256: 55d3611ee5a7620cd1f17c0083e78b1df367982757c0fd90e91c133b04250b2e
font_01_sfnt_off0000f8fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FD 9948 bytes
SHA-256: 75bba839a289bf997023c1a00cd7586ad22e5eff05190c1f56e9b2b42ed25ad8

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