Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b7c6deac994b435…

MALICIOUS

PDF

86.3 KB Created: 2021-06-01 02:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9718002d7c1ea7dabeced7e9f87d08e6 SHA-1: e46939bb88678455bf6d234d3e88b684d5ba0322 SHA-256: 3b7c6deac994b435bac6832bada9eb850e40d242d6fcaf72a26ef4ba4d7f3ba2
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, with one prominent URL leading to a site offering 'icloud unlock online free 2020', suggesting a phishing or credential harvesting attempt. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document may be designed to trick users into providing a password for an archive, a common tactic to bypass security scanning. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://garglob.ru/pbw?utm_term=icloud+unlock+online+free+2020 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456379/normal_5fde65dd44f31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412582/normal_5fee6b3edb8bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484358/normal_5ff783391dae3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493597/normal_602ad2c2bdcaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378157/normal_605118f2c00fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377642/normal_5fd66b9e8a2be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482880/normal_606e11b6b5810.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393644/normal_60129509d0e09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421329/normal_6055b9bf1c7a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483349/normal_60695024da5bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461509/normal_603fd44588ca8.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/87669eca-a305-4c11-820e-b1f67aa6552f/35314905027.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/073c2175-a295-4093-9a5c-8bbbda2e0a25/42315386844.pdfIn PDF document text
    • http://sijomirurefi.pbworks.com/w/file/fetch/144431370/epson_l3110_adjustment_program_zip_password.pdfIn PDF document text
    • http://wijozuzapusa.pbworks.com/w/file/fetch/144436281/new_balance_md500v4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98ff8bc1-955c-41ac-9b9d-011227bdbd17/688951913.pdfIn PDF document text
    • http://sizolasipape.pbworks.com/f/kalnirnay_april_2019_marathi_calendar_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/193f3314-a381-4f3c-bf62-b1eae1d05a9b/simon_and_garfunkel_ukulele_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a840449-6b6a-43c4-8fa0-2d5eeadf682f/72373553115.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/236a4d37-80e6-4035-a9af-e5639830ff90/what_causes_neonatal_jaundice_treatment.pdfIn PDF document text
    • http://xifilipisi.pbworks.com/w/file/fetch/144413262/38181078302.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d38f74e4-592a-4c30-9c67-42d8bb1f77e8/57805375647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3ebd6dd-9fb1-44b9-a2ab-151ce2ba7bdc/68723578403.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/f/how_do_you_alliteration_in_a_sentence.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_off000114a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A1 4904 bytes
SHA-256: 98e128aa5ddc562976b062ee7cc819a3690e7e0819bc79149578c49ddbce6b8a
font_01_sfnt_off00012566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12566 11164 bytes
SHA-256: af58513e68487168f8c38fd5a95209516df0a75c13c340c2fae369d7618a5e84