Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ff358c7300fd140…

MALICIOUS

PDF

77.2 KB Created: 2021-03-18 01:05:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: aba16e1ff7baf94949f05c03a33f2129 SHA-1: a4e5980d5cb3f402b5519b622d46c552dd034bad SHA-256: 5ff358c7300fd140fd905a68d97456b30dc7d22cabc6da82cc5056e1c65d0fe9
126 Risk Score

Malware Insights

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

The PDF file is detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site or download further malicious content. The document body, though heavily obfuscated, suggests a lure related to 'Believer lyrics pdf download'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/award?keyword=believer+lyrics+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476595/normal_602f829fb2809.pdfIn PDF document text
    • https://cdn.sqhk.co/fegadosijete/tWiijaI/53868786576.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_5fe7bc677087a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461509/normal_600fe9ad24f67.pdfIn PDF document text
    • https://cdn.sqhk.co/debefuki/aYuhbge/fatal_raid_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rapedipular/6KgijUl/94726687457.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/whats_the_product_code_for_sims_4.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/62870dad-c267-466f-980d-263a2f16de1b/xitoxufibiruteruxulul.pdfIn PDF document text
    • http://woranuganavot.myartsonline.com/metaphor_worksheet_for_3rd_grade.pdfIn PDF document text
    • https://7d33af4c-acfd-4996-9436-348e89828b5b.filesusr.com/ugd/289672_01e107a95ce543dbb62173c7bd946c1c.pdf?index=trueIn PDF document text
    • http://vorisenunajix.myartsonline.com/lurakakafosav.pdfIn PDF document text
    • https://e5eb5b25-b33c-43e3-82d5-57ab1bf863d8.filesusr.com/ugd/b0c717_270d8c825f614916ac3631db15f0d07d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/154b33b2-8fb6-4552-bc16-400aae0d8a57/maytag_bravos_xl_washer_pump_filter.pdfIn PDF document text
    • http://jubogaju.atwebpages.com/samsung_un60fh6003_stand.pdfIn PDF document text
    • https://17c3d818-7f64-4152-976a-2fa997d7a7be.filesusr.com/ugd/e2c250_68e415c7c6d74bb5b3a6b89547da2f57.pdf?index=trueIn PDF document text
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_fbf42fa903704e75ab151641c20ef983.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/desenaz/18700054275.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/how_to_transfer_mini_dv_without_camcorder.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/fabezafiti.pdfIn PDF document text
    • https://02ee9779-94d6-4ec7-959f-c0f99fe19a35.filesusr.com/ugd/cdc607_eca15cc96f9c481485453c8268b4206c.pdf?index=trueIn 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_off0000ec94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC94 5452 bytes
SHA-256: ecef893c58212533a4937f01770d12e52d8b1c660b3896f69428315873097b3b
font_01_sfnt_off0000ff54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF54 11472 bytes
SHA-256: 363be228cf76d6137d042f00f881e0eec3ae0a7d3d7936b627b5e1f731b736d4

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