Malicious PDF — malware analysis report

Static analysis result for SHA-256 21fe61ca415eb121…

MALICIOUS

PDF

75.8 KB Created: 2021-01-02 14:17:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63cf4ccb55eb1800b02f725f7510fa23 SHA-1: 08448e3f4fcc348ce5ad46d3af142da4a24e2d37 SHA-256: 21fe61ca415eb12171f5682ae51e523a4c7dedf4982976c4e9ee15561c6704d1
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, specifically 'https://trafffe.ru/aws?utm_term=fallen+london+smen+guide', suggests a phishing or credential harvesting attempt. Although no scripts were explicitly extracted, the PDF format and embedded URLs are commonly used for delivering malicious content or redirecting users to exploit kits.

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/aws?utm_term=fallen+london+smen+guide
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/3321024.pdf
    • https://raralulewuk.weebly.com/uploads/1/3/4/4/134478892/giwuvuji_dabexe.pdf
    • https://cdn.sqhk.co/mutexeze/JvYBUgh/vomero_5_sp.pdf
    • https://nokavapeselodes.weebly.com/uploads/1/3/4/6/134638024/derebekane_palozidobijuz.pdf
    • https://cdn.sqhk.co/businaxidare/jd0hgie/26405168888.pdf
    • https://lififamofupuge.weebly.com/uploads/1/3/4/3/134317858/budofufami-jexepirix-webuwab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/novifamigot/89024620749.pdf
    • https://uploads.strikinglycdn.com/files/f6a01af2-4db1-469f-a01a-d9e3190df042/knife_throw_game.pdf
    • https://uploads.strikinglycdn.com/files/ce5c34dc-c954-47c3-b59a-0ceaba68300b/xagasitaxa.pdf
    • https://uploads.strikinglycdn.com/files/21c95b08-4436-4f57-b3d7-2a964f321bf3/7536511305.pdf
    • https://s3.amazonaws.com/zuguvoxoki/aasma_ko_fir_jamise_song_mp4.pdf
    • https://s3.amazonaws.com/bubisifapagefe/81834115478.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_off0000ed71.bin
856d550dd9c2827cbad6155eebc23a26124c739ab008fb22bd86df0de0ad1d73		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED71 5004 bytes
font_01_sfnt_off0000fe66.bin
626cdbdb1fcf0b52e3005908af50bdf52b91e11fab934689946b2194aec0b14b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE66 10512 bytes

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