Malicious PDF — malware analysis report

Static analysis result for SHA-256 50bb5d8fe4638128…

MALICIOUS

PDF

79.6 KB Created: 2021-03-25 14:40:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 049c787727e7e07ea2ce3ab598bacdef SHA-1: 2eb0291e7c34ea5edae624b3c03b1650ec93997f SHA-256: 50bb5d8fe463812814fe9cc37e39dca16975bb698db34ab24e17e576982fd822
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://baarspo.ru/strik?utm_term=calories+in+arby%2527s+horsey+sauce+packet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4419820/normal_5fc5a9d2bd296.pdfIn PDF document text
    • http://xovijezup.mywebcommunity.org/vurepuparitewadometi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424024/normal_604cbfe56b44e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407818/normal_6033fa70c3f2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459035/normal_6044947041cac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479454/normal_5ffe9615bb69c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444113/normal_60260eecddeb0.pdfIn PDF document text
    • http://jakuzilikigo.iblogger.org/fugejebitaxiwub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459319/normal_602baf8523e43.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tapanowi.epizy.com/avatar_full_hd_movie_filmywap.pdfIn PDF document text
    • http://pojoviraxerojo.myartsonline.com/ganesh_atharvashirsha_in_telugu.pdfIn PDF document text
    • http://famekemij.epizy.com/nalibogikosaxoxezetusiw.pdfIn PDF document text
    • http://vuzuwukef.atwebpages.com/motigeliwelil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/999d0883-cc04-42e9-b7d6-6861d8393fa4/magic_chef_wine_cooler_repair_manual.pdfIn PDF document text
    • http://kikiregunuda.rf.gd/differential_and_integral_calculus_by_feliciano_and_uy_complete_solution_manual.pdfIn PDF document text
    • http://goterarok.rf.gd/bejenunatukunumejugiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10bff537-2b6a-4788-9e43-e1147610f1f9/intermediate_algebra_for_college_students_8th_edition.pdfIn PDF document text
    • http://gubilozav.epizy.com/57395137698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56e6ba7d-1c6b-46d5-be32-62efb2d972b4/language_in_thought_and_action_by_s._i._hayakawa.pdfIn PDF document text
    • http://duwimufowewis.epizy.com/miwifojilax.pdfIn PDF document text
    • http://betiravel.epizy.com/daxabivakud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00103f00-0b3d-4529-81d1-b5516ae2158b/sutega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27500dde-ab5a-4b98-bc16-b52c0ef20b4f/diana_her_true_story_summary.pdfIn PDF document text
    • http://zivosefim.rf.gd/sotekopopujuveki.pdfIn PDF document text
    • http://roduzafudi.rf.gd/abbyy_transformer_2._0.pdfIn PDF document text
    • http://kipejefanowisu.atwebpages.com/44221061976.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_off0000f5d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D1 5268 bytes
SHA-256: 4c41cfd9bb230e8c978106cfbe479c7691346807bfc973a27be9e416aac37cd0
font_01_sfnt_off000107ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BA 11352 bytes
SHA-256: 4291d92fd1e40a32f9a436de870f7fc81ee81d61ac101ea5c3b6472d6a84c626

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