Malicious PDF — malware analysis report

Static analysis result for SHA-256 9789ee9a912f6b0f…

MALICIOUS

PDF

71.9 KB Created: 2020-12-22 21:57:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 12c9147ed79acd58e63646a635bbaf35 SHA-1: c2c4ed9ec96560d601b722b4a8f559cf7d8a476f SHA-256: 9789ee9a912f6b0fd0c34315eafb0baf814355196ac10e6fbd7a2f06cab4be95
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=jurassic+world+survival+download+game PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423700/normal_5fa91cb2e3b1b.pdfIn PDF document text
    • https://rizitutidu.weebly.com/uploads/1/3/1/8/131856545/2971915.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494648/normal_5fbebdc3d564b.pdfIn PDF document text
    • https://fekogekakoxoki.weebly.com/uploads/1/3/4/6/134625435/1999840.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fdd5508eb685147a09c9c9e/t/5fddd12aa3b92b153c13d750/1608372522447/25647126925.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/voice_recorder_pro_app.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d785085bf90c0efcc6ad/t/5fc120ce9ee0f32b877b2c3e/1606492367636/how_many_chapters_in_their_eyes_were_watching_god.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/mobikexufi.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/2090648563.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/98629770885.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d2a2e7d-7550-4bb9-814b-ad6ddc196f10/48029399488.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/139817442.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcef0a45ca4f790264b584/1606217484831/88327990681.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc77e71717a0f60c403af1c/t/5fd16d3af2ee360040ed5540/1607560506819/t_mobile_ceo_number_transfer_center.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_off0000cf8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8D 5400 bytes
SHA-256: 3234a51bdc1c41943d9d34b595b666cc2c11b6e0bdbe13885cf62a31bc8d34b5
font_01_sfnt_off0000e1e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E3 2476 bytes
SHA-256: 1151ff8b7adddd57e82b26bfb084a6f4f57b3ac297276139eeb2f3b71c724c70
font_02_sfnt_off0000ecba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBA 11028 bytes
SHA-256: 0664f71c73a1cb7bc407360c68b82485b73e01421c8a6a77c42cc4932c464e1b

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