Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6f0e638b52946f…

MALICIOUS

PDF

79.5 KB Created: 2021-03-17 23:12:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0090dec228c6480ec4402a9fb3c0934e SHA-1: d210e97f3a8e6a9b5e1d34f25078492c8d8b5243 SHA-256: 7d6f0e638b52946ffebb250f6cacf9e03bdfa2f89457fef074dc43fa92f8811a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant number pointing to disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xajibur.ru/123?utm_term=bossy+bossy+godfather+song PDF link annotation
    • http://blockingscenery.com/sezujutovitumuzazeler7js2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380699/normal_5fdacc3a239b2.pdfIn PDF document text
    • http://islta.fun/57658386077t7bz6.pdfIn PDF document text
    • http://rowexusaje.mypressonline.com/anemia_ferropenica_fisiopatologia.pdfIn PDF document text
    • http://megantv.site/90318468820om9al.pdfIn PDF document text
    • http://ellmax-site.xyz/overtake_traffic_racing_hack_mod_apkv6ra2.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/8th_grade_math_textbook_california.pdfIn PDF document text
    • http://grusha.space/nausea_jean_sartrejpb4k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378599/normal_5fe3c76bbd991.pdfIn PDF document text
    • http://zisuroto.mygamesonline.org/are_digital_tire_pressure_gauges_best.pdfIn PDF document text
    • http://mevakimuvu.mypressonline.com/5737327541.pdfIn PDF document text
    • http://temppicture.xyz/what_are_the_requirements_for_cdl_training66m2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415782/normal_600c8fcbc8c03.pdfIn PDF document text
    • http://j3vnci4.xyz/nazibenepobasuna6c0v0.pdfIn PDF document text
    • http://yewes.space/76813202684p4vyg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487927/normal_6048c450e81be.pdfIn PDF document text
    • http://recepty-dd.info/desopekn54xz.pdfIn PDF document text
    • http://trysoda.pro/how_old_is_andrew_wommackio8nv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e40da922-b0e4-44be-9878-2d4898ccab21.filesusr.com/ugd/3a38e0_a6683ecf892e4df3b6aecbe96faf495e.pdf?index=trueIn PDF document text
    • https://506dbbd1-d4b3-44b1-a4c9-6b5d0cab6a23.filesusr.com/ugd/c75f60_bb356d8cb04546cd96ae05b37f398e27.pdf?index=trueIn PDF document text
    • https://1b15a19f-c8c2-4d9d-8c2f-e97aa7ecfe2c.filesusr.com/ugd/eb6c48_83c0f4dec4fc47ea97b08df88ea357d0.pdf?index=trueIn PDF document text
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_efdf587dd8d44506ac715e63beae89b5.pdf?index=trueIn PDF document text
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_eaec8bf203de4986bdee098b28d2f82b.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_off0000f635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF635 5428 bytes
SHA-256: b28969c814b9f8a3cff104f3a63b3267559aa20d4040303ec78434a42b788c15
font_01_sfnt_off000108b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B2 12040 bytes
SHA-256: 6dbb01a4f5413456e2fab34f9720df3b1b3c8b89d81a5fcbe68ca3f76a4f9227

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