Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd7b757e58fb12b…

MALICIOUS

PDF

70.6 KB Created: 2020-12-19 20:44:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 73c1059e0e0b628071e8b2ccb44cab59 SHA-1: 184517bfeca0026efd0241b2776fc469bb7cc249 SHA-256: bbd7b757e58fb12b0e23c9cd2c05920b8b24b8db48cb6430f04a9576ccfce1b4
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains a large number of external links, including a suspicious URL hosted on 'traffset.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to a 'love poem with analysis'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffset.ru/strik?utm_term=love+poem+with+analysis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368489/normal_5f97f8c7c9864.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472793/normal_5fd95c516a173.pdfIn PDF document text
    • https://wazajodowefode.weebly.com/uploads/1/3/4/0/134017502/db8b822396.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368760/normal_5fdadedf8771f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412154/normal_5f9bae7d8153b.pdfIn PDF document text
    • https://gegoviboz.weebly.com/uploads/1/3/4/8/134876631/227176e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_5f89fce742ea0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d96ff2d0-4846-4631-8785-327830b92a5e/veloroxosakesi.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/xedataluli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b70949e-ba9b-4597-abe8-4dbcc84dfff7/buvofuwuniwabafopetorov.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/vuwijonaxubatidibol.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ce8ac6d964583621afbb/t/5fc14c853f75b1664304a551/1606503558815/yugioh_speed_duel_tournament_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ce67734-5011-43de-b485-c9cacdf77dd4/xenoverse_2_new_transformations_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/auctioneer_addon_3._3._5.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD0B 4944 bytes
SHA-256: a7a735c957940e337c87412a1bad29eddf588de285a2cf8d885a7735584dc7f1
font_01_sfnt_off0000ddd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD2 10288 bytes
SHA-256: 62636806a2f82706ae5fffc3920f79adda11d99016b493153ea9b5c436d8ea52
font_02_sfnt_off0000ffc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC8 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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