Malicious PDF — malware analysis report

Static analysis result for SHA-256 731ab1fd98bd3b06…

MALICIOUS

PDF

61.1 KB Created: 2020-12-16 18:33:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 174f29d6b14a0c78fbfc6e53ff4e17df SHA-1: 2096be7322ca74c418078e25612d3c9d4f37c81d SHA-256: 731ab1fd98bd3b06c9c5c447a08832cafa5ea7b298e918d5dd0373802a0aa218
244 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to known malicious redirectors or disposable hosting. The document body, though heavily obfuscated, suggests a lure related to a 'Behaviour modification plan template'. The presence of multiple links to potentially malicious sites indicates an attempt to redirect users to phishing or malware-hosting pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9427

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://traffine.ru/aws?utm_term=behaviour+modification+plan+template In PDF document text
    • https://jewojumafolu.weebly.com/uploads/1/3/4/6/134651010/9263342.pdfIn PDF document text
    • https://kixovomez.weebly.com/uploads/1/3/4/8/134868331/1d4e39589c49.pdfIn PDF document text
    • https://ruxibudowivuk.weebly.com/uploads/1/3/4/7/134728491/levavafiwewureladix.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/zuwerevufu_fakodo_wotinete_rajizelu.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/basevazare.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/f865e49d-93a5-41d4-9c43-fd46b3d90e9b/ales_kitaplar_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc36d523dfdd95b60e52950/t/5fc81c87bbb7f45a927d74ae/1606950024112/command_conquer_red_alert_2_steam.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce4f1a5d43e676cbd4e512/t/5fd6f07cb1c3f31c7a96befe/1607921788800/free_calling_software_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7edc7f0b-4543-4ea6-925a-2daab76c8161/jeep_wrangler_running_boards_near_me.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5940cb3e0f577146a65f/1606375748730/chaparral_boat_dealer_oklahoma.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/feguxexad.pdfIn 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_off0000af8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF8E 5208 bytes
SHA-256: a17a31fe9776c5183fd112d5c32a8f564ac00fed5d084cfaa3bcb1275288a3a9
font_01_sfnt_off0000c126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC126 10284 bytes
SHA-256: 0d3b63d621b81cee9c9f0080eb9ccaa0b21b83a9cac972d834d7d25291cb248c
font_02_sfnt_off0000e452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE452 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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