Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ce94b1e04ce527a…

MALICIOUS

PDF

75.3 KB Created: 2021-05-07 09:24:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: be6d20d555997977a3ddfdb603fe200a SHA-1: da86ee681eb30752e5fbe92dafc03ba672e7b2a5 SHA-256: 1ce94b1e04ce527a3ce0d6759d802da30fcd33fd4e2aa1d1f69080cd72368daf
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 0.9960

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://ponafet.ru/strik?utm_term=lg+wm3470hva+parts+diagram PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409606/normal_604e5e95cd047.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394066/normal_5ffceff75df66.pdfIn PDF document text
    • http://vidavubaxo.22web.org/wenosur.pdfIn PDF document text
    • https://cdn.sqhk.co/tovisegag/Bihheib/67887631672.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470821/normal_604cda5590351.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/fjfXibQ/neon_air_hockey_prodaja.pdfIn PDF document text
    • https://cdn.sqhk.co/savujegu/ewggij7/jamemometirubon.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/d7aXVRM/48876240290.pdfIn PDF document text
    • https://jeduwenerapowi.weebly.com/uploads/1/3/4/6/134678879/8ff61a541b0d59.pdfIn PDF document text
    • https://vojidejera.weebly.com/uploads/1/3/2/6/132695434/0f0cf588e33d7.pdfIn PDF document text
    • https://lijoliwaxodoxi.weebly.com/uploads/1/3/1/3/131398144/kalabusuge_nasad.pdfIn PDF document text
    • http://zemegulobeka.iblogger.org/11122183784.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500429/normal_5ff5482f48ad0.pdfIn PDF document text
    • https://kulexixujida.weebly.com/uploads/1/3/4/7/134723957/lozefowugub_gunuweno.pdfIn PDF document text
    • https://nomumiti.weebly.com/uploads/1/3/4/3/134330837/bigubowij-navimugini.pdfIn PDF document text
    • https://cdn.sqhk.co/kigimole/tijwhjg/6185455930.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/6hdigjb/calligraphy_fonts_free_marathi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444657/normal_6054cd21426a1.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/8459f362-0fa3-41f5-bda9-114d1d2c0cf9/sopopotubixuluvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75e8d37e-9fac-492e-a232-fd0d7ed4c4c7/california_common_core_standards_language_arts_1st_grade.pdfIn PDF document text
    • http://kimabajakagun.epizy.com/guxijag.pdfIn PDF document text
    • http://gotazuvibidok.epizy.com/63054203447.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44cd7e21-81a5-46c3-80aa-7111f3c9f234/luzolupawiwafomuzuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e542a6e-a7fd-46cf-ac0e-6cb3ad22cf3b/88629830565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a41cea01-131f-4333-8642-e7b18eb9a232/xedidejepir.pdfIn PDF document text
    • http://gozixug.epizy.com/73924826194.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_off0000e75f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75F 5908 bytes
SHA-256: 8b7250cb722727955131478223201400c392592f964e682ed64cb77ef432c80e
font_01_sfnt_off0000fb7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7F 10536 bytes
SHA-256: b0f841c65978a224b0981a9e5d70ba5f13d47c88046de3c4b91a31f16f40facb

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