Malicious PDF — malware analysis report

Static analysis result for SHA-256 7633b7db1644d05a…

MALICIOUS

PDF

72.4 KB Created: 2020-12-17 21:28:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 39b96a2ba3fca22cab7f71e18fceb9f5 SHA-1: 96226e255243f4ae9e17cc6fc80cc3b796aabd83 SHA-256: 7633b7db1644d05a804c6115a1786b8ac793335aeedfba15acf9e8c16af37a93
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=solar+powered+bug+zapper+lowes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465685/normal_5fd30985e2a75.pdfIn PDF document text
    • https://datugabow.weebly.com/uploads/1/3/4/7/134745554/93d4fdbb44b.pdfIn PDF document text
    • https://joxisewegiwazev.weebly.com/uploads/1/3/4/6/134669132/5895986.pdfIn PDF document text
    • https://lesavudipuvu.weebly.com/uploads/1/3/4/3/134338744/bimuwidezamedan_terebuvifew_fuxobeko_tajiruti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387219/normal_5fc3f423905a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383703/normal_5f9116c8ec4ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419236/normal_5fd9639db301d.pdfIn PDF document text
    • https://kazigujexumakul.weebly.com/uploads/1/3/4/3/134320364/9360427.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378621/normal_5f93ddaabf9b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479673/normal_5fd9bcedca532.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/292427fd-8343-495f-aac8-766275a98dac/masinikitapabuvegebewulij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e4b1778-70ee-4bee-b1bd-c487e1bc6bbf/statistics_chapter_2_test_answers.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9D 5512 bytes
SHA-256: f2e98139ef97f3951aeb4855f9412134a7f5433ac10d0f058056b1f376df0b29
font_01_sfnt_off0000f17c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17C 10352 bytes
SHA-256: f94bd3666504d7099a95e6a810b154bde03f2b8ee1faf20f54036250502ceea7

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