Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2f7e0fc88ea4514…

MALICIOUS

PDF

79.6 KB Created: 2020-11-20 09:24:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 410c612234e9a91a39f84345e52c31e9 SHA-1: 9d4c1c5a5ffc003342d6100b3b8744e05329e63d SHA-256: e2f7e0fc88ea45146b4479563953bd858601107f0384802a3635b500f9b3b8f0
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URLs, with at least one, 'https://trafftec.ru/aws?utm_term=beatles+piano+sheet+music+easy', appearing to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, contains text suggesting a lure related to 'Beatles piano sheet music easy', likely to entice clicks to malicious sites.

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://trafftec.ru/aws?utm_term=beatles+piano+sheet+music+easy PDF link annotation
    • https://zopoxetofosifa.weebly.com/uploads/1/3/4/8/134863155/4019262.pdfIn PDF document text
    • https://lavabowigu.weebly.com/uploads/1/3/2/6/132682694/lijujudojiniw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415745/normal_5f9dff7249400.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387036/normal_5fa439ba811dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401714/normal_5f9af71174486.pdfIn PDF document text
    • https://bimelubisazabe.weebly.com/uploads/1/3/4/4/134492892/tobusirinume-pemukagejev.pdfIn PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/musosiz.pdfIn PDF document text
    • https://nipabidomebamo.weebly.com/uploads/1/3/4/6/134671433/serij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479462/normal_5faa1e0cedd6d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e3d1c5b-c689-4d3c-a02f-44aa7964c77c/jonusexoborakosu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88e19ba0-b06b-4398-abac-84d9b8434a10/kekinavajowikoneleza.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/asparagus_racemosus_medicinal_uses.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/11430961863.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE644 5228 bytes
SHA-256: d22ee775945bd2839dd776334021d1bcc2c519d36fea3ca3e5564ee95798281f
font_01_sfnt_off0000f7f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F4 10784 bytes
SHA-256: bdda0e4f388f8e995968afe4a182960bb4a5b401fc4e320ddab69f2ff1e1248b
font_02_sfnt_off00011c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C82 16100 bytes
SHA-256: 84650fe671c70ac66f3af0994468c9b9feb42d01905b0f030d5781e095ef8e52

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