Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd49ec2a848b07fb…

MALICIOUS

PDF

84.0 KB Created: 2021-04-05 19:20:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d638b59707bb04c1170b24aaf2392ba SHA-1: 306d01d7d85dbf77fd91898a8c4b135c3e974394 SHA-256: cd49ec2a848b07fbac9633608b100e0eb5e97823364983b0ced4fd89dd58ecce
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'vilenefex.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'newspaper report examples'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a phishing attempt designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=newspaper+report+examples
    • http://coolvdomaion.online/vilegiz5rf7o.pdf
    • http://bavunexebiri.iblogger.org/brain_death_criteria.pdf
    • https://static.s123-cdn-static.com/uploads/4417039/normal_6006b08f23426.pdf
    • http://lnstagram-helps-contact.com/where_the_wild_things_are_summary_movie2b14d.pdf
    • https://cdn-cms.f-static.net/uploads/4530910/normal_606b145291766.pdf
    • http://euromarket.pro/tugosisenibufagowonejez3c5q6.pdf
    • https://cdn-cms.f-static.net/uploads/4369166/normal_604a5305605d1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/24be9e32-a174-49d1-b587-b66a64fd2f6f/dd_beyond_character_builder_free.pdf
    • https://s3.amazonaws.com/remuv/stilbaai_charleston_line_dance_step_sheet.pdf
    • https://s3.amazonaws.com/sezebepit/the_highwaymen_movie_score.pdf
    • http://jijawidifopaw.epizy.com/73600870368.pdf
    • https://uploads.strikinglycdn.com/files/0f164339-57c2-467d-81ef-69f357c4a92e/what_does_a_contract_attorney_do.pdf
    • https://s3.amazonaws.com/dogazisuze/dajafukinimuzizuzorowozel.pdf
    • https://uploads.strikinglycdn.com/files/fba1c470-26fd-4854-a49c-059a1e882b20/para_leer_al_pato_donald_audiolibro.pdf
    • http://tifobegujetesa.rf.gd/65950211263.pdf
    • http://temomuduzuba.epizy.com/abscesos_cerebrales_pediatria.pdf
    • https://s3.amazonaws.com/mesixadelomomo/lagu_anne_marie_friends_mp4.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_off00010b5a.bin
068fc3aab6c46c3f40063a1d8c5d560a9d533378c96e566d99c13bf7841edc10
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5A 5096 bytes
font_01_sfnt_off00011cb1.bin
1ec6fc8d19de02189eca5b8f69b8a1be85d0fd31b35b78ca4976dc322277db3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB1 11260 bytes