Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0722d3fd8f3bdc9…

MALICIOUS

PDF

69.9 KB Created: 2020-12-22 14:34:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 074dfc31bd5ae43d9dba87b802e3bdd3 SHA-1: 757ec5f4b31c0cc2f8e7ab47ce64ddffd428496d SHA-256: b0722d3fd8f3bdc9be88adf6df9361b8d6f58282387e33a91b0f1de45a4e47c1
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to PDF files hosted on various domains, suggesting a link farm or phishing campaign. The primary URL, 'https://trafffi.ru/strik?utm_term=dj+song+mixing+software+for+pc', indicates a lure related to DJ software. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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 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://trafffi.ru/strik?utm_term=dj+song+mixing+software+for+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409813/normal_5fb59ddfb0bc4.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/wasonu_vakenafek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418180/normal_5fd2436316e45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382629/normal_5f92d5192f383.pdfIn PDF document text
    • https://vataripisak.weebly.com/uploads/1/3/4/6/134600115/dovijepizu_rexekofo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427295/normal_5fdfb8aeee84f.pdfIn PDF document text
    • https://fifimijo.weebly.com/uploads/1/3/4/7/134748793/kekifaxulosujulimufe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418178/normal_5fb9f1dcd28c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409801/normal_5fdf952962661.pdfIn PDF document text
    • https://belonimilulufaf.weebly.com/uploads/1/3/4/4/134403367/ponogexa-poruxukoja-xewiseparabu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5a77d116eb00e3c6c6a61/t/5fce0e3d7ae85b53b2b8c177/1607339581972/maxufigafejisafabe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcdfcfaecb86110b1356bd8/t/5fd75c85d654060362e5ff2b/1607949446428/gimugoduzifopudanogur.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce07c8cc0d2519aa9ed463/t/5fd64fcaab777271768c5228/1607880651046/astrazeneca_email_address_format_uk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe181fda57a2d0a9db3dfc5/t/5fe1998dc70e3835b6f3e776/1608620430407/accelerated_reader_answers_for_hunger_games.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc15629df132613bbc0c61d/t/5fce303fc00f007cea12aad1/1607348289523/35086405775.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_off0000d37a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD37A 5536 bytes
SHA-256: 8d91f3ca6eb88d3843e58206745dd07ecea970094c6e38b96e61ea2a0de30431
font_01_sfnt_off0000e661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE661 10640 bytes
SHA-256: 4b7dce5b6cbcfc6acdd0bf5db0eb365260979360b2fcbece056b45b8a7f80856

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