Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ce5ba94971825b3…

MALICIOUS

PDF

78.7 KB Created: 2020-12-21 08:22:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b20338ea91ae65a9a1f8d3ff0e5515c SHA-1: d1447ee8debccba8d35446c18810ee299d533690 SHA-256: 3ce5ba94971825b3128a5d56b67226e9aa1dc3173e12d094ce5d187ea88cb90a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV detection and an ML classifier. It contains a large number of external links, with one suspicious URL pointing to 'trafffe.ru'. The presence of numerous links suggests an attempt to direct users to potentially harmful websites, characteristic of phishing or malware distribution campaigns.

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://trafffe.ru/123?utm_term=i+hate+hamlet+pdf
    • https://cdn-cms.f-static.net/uploads/4453732/normal_5fbebd24e33d0.pdf
    • https://static.s123-cdn-static.com/uploads/4377377/normal_5fdde3ba7e27f.pdf
    • https://static.s123-cdn-static.com/uploads/4452169/normal_5fde68c2d2d8a.pdf
    • https://dipitamadupod.weebly.com/uploads/1/3/4/8/134882687/nasivepem.pdf
    • https://static.s123-cdn-static.com/uploads/4492901/normal_5fc93621a8159.pdf
    • https://manoxumumaxu.weebly.com/uploads/1/3/4/4/134472756/bda6262b80.pdf
    • https://cdn-cms.f-static.net/uploads/4478932/normal_5fdc6bc7ceb52.pdf
    • https://cdn-cms.f-static.net/uploads/4387417/normal_5fac600489c78.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc0f4a62e34347c70445090/t/5fc170b53c6ccf69f394732c/1606512823123/download_tiger_zinda_hai_full_movie_hd.pdf
    • https://static1.squarespace.com/static/5fc1079560f2895dc1e88f35/t/5fc59d7f61e25426e1f8fd31/1606786432964/sony_bravia_32_inch_tv_price.pdf
    • https://static1.squarespace.com/static/5fc3d3f7084698658e709650/t/5fd16843071bbc68801d4f0c/1607559243938/xedefejirerakowekatexafa.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe2f976457125654049abe/1606299546492/14474549065.pdf
    • https://static1.squarespace.com/static/5fe0158af67c863bcd193198/t/5fe019786a6ad7222f41966e/1608522104665/difference_between_charismatic_leader_and_transformational_leader.pdf
    • https://static1.squarespace.com/static/5fdc7b6f43483e57e2cf12c2/t/5fdd1f7d4868181bbe794175/1608327037912/xifizurikokarox.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfb9.bin
02174ddc721c561bf89020e264f4c216340cccfd85d42eac327fd4087496dd1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB9 13184 bytes
font_01_sfnt_off0000fa3d.bin
074f00a18664cdc590f7a0959edea7a14793725cff1cddc90a9cb7afecaa0c1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3D 4944 bytes
font_02_sfnt_off00010aee.bin
ea1e22277a31bde0226216df7ee36f84406ece14016865afde92df090ec2c874		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEE 10140 bytes

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