Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcebad08e7ebbd36…

MALICIOUS

PDF

76.2 KB Created: 2021-03-14 23:42:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 4b09ee44a017c527b3507f681b7c083a SHA-1: dfbe1cf9a80d8120a8546579dde98eff1f68c69b SHA-256: fcebad08e7ebbd3668db06754ae94e4e2dba0b84dfdf1257779902778f4424ad
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. The document contains numerous embedded URLs pointing to link farms and disposable hosting, suggesting an attempt to obscure the distribution of malicious content. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating a deceptive lure to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=mutual+lease+termination+agreement+pdf+california PDF link annotation
    • http://subanufuxazis.iblogger.org/43673354250.pdfIn PDF document text
    • https://cdn.sqhk.co/kapipota/chdgcVG/alien_shooter_revisited_free_download_for_pc.pdfIn PDF document text
    • http://kernig.store/hp_elitebook_8560w_bios_update_windows_10e8gc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449603/normal_600fb50c17acf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383801/normal_5ff0e9eaeffaa.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwifemi/58tzgex/86020012941.pdfIn PDF document text
    • http://tosiwegijulu.iblogger.org/guvurefikufonetuj.pdfIn PDF document text
    • http://meinekarten.best/bumask1xnv.pdfIn PDF document text
    • https://cdn.sqhk.co/pasepizut/vBghaKs/gudeguveduresezazi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413121/normal_5ff991c19cea7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488314/normal_5ff25640bda37.pdfIn PDF document text
    • http://ygrash.website/jajufewuwomolibiruwopitlhnn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458635/normal_603a144835b27.pdfIn PDF document text
    • https://cdn.sqhk.co/vojazodelud/lUifjbU/57824404818.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375203/normal_6041e1c730c2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456699/normal_5fe2745cafc08.pdfIn PDF document text
    • http://organic-ita.space/chevrolet_corvette_stingray_c7_transformersffusm.pdfIn PDF document text
    • http://mijuxub.66ghz.com/69373607778.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/68993e4a-e4b3-4b39-bed3-2ae8b6c192a5/19580625502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aebe3149-20a0-4f41-8ba3-691a5bf07e72/how_to_replace_samsung_suspension_rods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ab95679-e841-402c-a086-cda7f44c725c/19204017487.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_off0000ed47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED47 5480 bytes
SHA-256: 41d199138e7381ca430fcb0f583c3eed589c9e45a123cbc904545ee287020cbf
font_01_sfnt_off0000ffe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE7 10452 bytes
SHA-256: 9f5558e17f3a0b457daf0c4cc73ec6e6f9243f27f1387420fc94912c5cb7c2b6

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