Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe35c7fbdd7fe4a7…

MALICIOUS

PDF

80.6 KB Created: 2020-11-20 01:40:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 796c41b6a7e2770bb8832f881df03a19 SHA-1: d2928feb083c76726079ab55200a0b54591951f9 SHA-256: fe35c7fbdd7fe4a7c606349636aec1e46cd2386f8151619f18c512a4c2d81ad1
176 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, indicating a link farm or SEO manipulation tactic. One prominent URL, 'https://traffking.ru/123?utm_term=opera+mini+vpn+apk+free+download', suggests a lure for downloading software. ClamAV and ML heuristics also flag this as a phishing or malicious PDF. No scripts were extracted, but the structure and URLs strongly suggest a phishing or malicious content distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://traffking.ru/123?utm_term=opera+mini+vpn+apk+free+download
    • https://jasebezaf.weebly.com/uploads/1/3/4/6/134630561/kovupixefa.pdf
    • https://kinanufojakosek.weebly.com/uploads/1/3/4/3/134350472/93851.pdf
    • https://kalokiran.weebly.com/uploads/1/3/4/6/134632324/9480189.pdf
    • https://kijadixuzot.weebly.com/uploads/1/3/4/5/134585523/df90c325cc9.pdf
    • https://jasevumoxemu.weebly.com/uploads/1/3/4/7/134707335/xufuvadu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jumedemimo/77952524220.pdf
    • https://s3.amazonaws.com/fenatagazise/army_asvab_study_guide.pdf
    • https://uploads.strikinglycdn.com/files/3a985ccc-16be-4d35-a596-fe12505b118a/wudipuvuzavaj.pdf
    • https://uploads.strikinglycdn.com/files/e9957848-0c86-4c5f-94cc-e6f4b8302e97/heteronomous_morality_and_autonomous_morality.pdf
    • https://s3.amazonaws.com/wutisigila/81729705186.pdf
    • https://s3.amazonaws.com/vigevot/wemedefudoxunuwe.pdf
    • https://uploads.strikinglycdn.com/files/3db825a5-4d33-4c95-9f20-9eb9fc5b0bb0/54510208148.pdf
    • https://uploads.strikinglycdn.com/files/d194a736-be0c-4f06-99c4-22f69ed5d517/homophone_worksheets_for_middle_scho.pdf
    • https://uploads.strikinglycdn.com/files/56c24558-7359-47d4-8a09-b37250d919c5/tijojazobelurewuroxugam.pdf
    • https://s3.amazonaws.com/biwuwukesazef/gizevisi.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd87.bin
1c91280eb79ffdc858b6ecd2b9b1b9121e398c569f5702dd47e27479ee3b0056		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD87 2968 bytes
font_01_sfnt_off0000e82d.bin
37036104eb4baaf7105b4cb318d789cf96d29d3db40a568d8baca5fdec49a124		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE82D 5252 bytes
font_02_sfnt_off0000fa0c.bin
fffbaf9d93cc9459482e32cd5ab9a9315ca03d728f6b7e7feca28bf61d342b65		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0C 11076 bytes
font_03_sfnt_off00011fae.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAE 16092 bytes

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