Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bc95a76faf43c1b…

MALICIOUS

PDF

71.7 KB Created: 2020-11-29 22:44:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a8f8a49d61229d11c76c4c77386bb9e SHA-1: d59d2d70a8babf7febbcc0cfe05c0645baf2ac41 SHA-256: 3bc95a76faf43c1b38679bb5e641ebdf1cef7a400e24e337c358002abe94416e
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to 'trafffe.ru', which is highly suspicious and likely part of a phishing or malware distribution scheme. The PDF structure itself does not contain executable scripts, but the presence of the malicious URL is a strong indicator of malicious intent.

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://trafffe.ru/123?utm_term=warclaw+armor+bolts
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pusolefosex/list_of_commonly_used_english_words_with_meaning.pdf
    • https://s3.amazonaws.com/mijedusovineti/21477449735.pdf
    • https://s3.amazonaws.com/felijaziremole/juzano.pdf
    • https://s3.amazonaws.com/lanubili/bemonc_training_manual_philippines.pdf
    • https://uploads.strikinglycdn.com/files/69af69b9-b2b3-4493-bd5a-feda79b5bd29/liwosixanabiz.pdf
    • https://uploads.strikinglycdn.com/files/84342894-a4d6-4a23-ad8e-3556bdec9334/possessive_noun_worksheet_grade_4.pdf
    • https://s3.amazonaws.com/vabedafozo/labeling_waves_worksheet_answer_key.pdf
    • https://s3.amazonaws.com/pujirageg/skyrim_revamped_complete_enemy_overhaul.pdf
    • https://uploads.strikinglycdn.com/files/2dee8cb8-5265-45a2-941b-66c835afebf3/84088787010.pdf
    • https://uploads.strikinglycdn.com/files/2501bf09-e024-4258-ab61-43fc5f73c455/bafuwufa.pdf
    • https://uploads.strikinglycdn.com/files/404a15db-2160-4505-b581-a8927c72445d/chapter_15-17_review_guide_answer.pdf
    • https://s3.amazonaws.com/tobovunoberiki/zujuseketa.pdf
    • https://uploads.strikinglycdn.com/files/12eec1a0-0183-4fd9-8d2b-65ca99f124f2/21353281202.pdf
    • https://uploads.strikinglycdn.com/files/ae456974-495b-487a-896d-ee00ba253731/lenofosijalorumisuvukozi.pdf
    • https://uploads.strikinglycdn.com/files/3a86b1c8-04d6-418a-9f98-a92a4d73a0dc/ximabaditolapololi.pdf
    • https://s3.amazonaws.com/sikuva/les_cellules_gliales.pdf
    • https://s3.amazonaws.com/jimugivos/138980274.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_off0000da84.bin
b42d8f4bac03ecf68d2f59d5c381cf019a36a22241a46b99fdd48feaec758c02
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA84 5192 bytes
font_01_sfnt_off0000ec29.bin
935ec938f6104cc5cec53db9c355dad8c2c6d1424e9eb9f37a075734d505a810
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC29 11000 bytes