Malicious PDF — malware analysis report

Static analysis result for SHA-256 6459e894606f007b…

MALICIOUS

PDF

82.0 KB Created: 2021-05-15 23:07:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8389c1326d697ce888f10ccbc3a3c9a SHA-1: 9b486eae2282008f1243075e131cfe88c02c88d1 SHA-256: 6459e894606f007b5d5b51932c9791b95f4ff257276f456b743b7f4034dbc702
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs and the PDF structure suggest an attempt to exploit users by directing them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/strik?utm_term=ilustraciones+para+predicas+evangelicas
    • https://jiromozuno.weebly.com/uploads/1/3/5/3/135387519/gofanojidixajun.pdf
    • https://nofuxufemi.weebly.com/uploads/1/3/2/6/132681390/408057d86.pdf
    • https://bodonovovo.weebly.com/uploads/1/3/1/6/131607174/6186483.pdf
    • https://cdn.sqhk.co/pixafosabow/l5rgjjs/modern_combat_3_fallen_nation_apk_mod.pdf
    • http://menesoger.iblogger.org/derogable_and_non_derogable_rights.pdf
    • https://xitosuwoga.weebly.com/uploads/1/3/3/9/133988858/rupofew_nufudulu_jogusuwu.pdf
    • http://tulumobutu.22web.org/fuxulirabironarurudiposa.pdf
    • http://piwifeg.22web.org/driverless_car_project.pdf
    • https://cdn.sqhk.co/wetewajaba/ijA1ihc/84905158622.pdf
    • http://totalcreditcheck.info/90268070316l7sp5.pdf
    • http://demask.fun/diary_with_lock_fingerprint_lock_20190j2fw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tozemuj.rf.gd/guided_imagery_medical_meaning.pdf
    • https://s3.amazonaws.com/xurixado/winning_performance_britain_s_got_talent_2019.pdf
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_9efe1556b05249b78e48c345a2532325.pdf?index=true
    • https://d5e9a058-cbdc-4968-ba72-30cdbf1e36a3.filesusr.com/ugd/9cfd0a_897de5299a584a62a5c8160566bfdd7d.pdf?index=true
    • https://s3.amazonaws.com/wivunonovef/getting_through_the_labyrinth.pdf
    • https://160e4e15-e27a-4ef2-9b26-f67fc0969a86.filesusr.com/ugd/cbdbb6_922d2c9754474cf89681853a9c5e4e4f.pdf?index=true
    • https://s3.amazonaws.com/gozifep/97762623909.pdf
    • https://s3.amazonaws.com/lekelepowo/indian_interior_design_company_profile.pdf
    • https://s3.amazonaws.com/lorifawuvawot/bahnwrter_thiel_gerhart_hauptmann.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100af.bin
8c7300572206a1f58abcb0e06ed0d4a94dc13c5f5ea9c1e704e845b697116718		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100AF 5236 bytes
font_01_sfnt_off00011294.bin
2069b958633bf87603104938c0130f5ea32391fd776342c1a22e30cb98a07849		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11294 12052 bytes

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