Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ec15817ce56b07e…

MALICIOUS

PDF

69.9 KB Created: 2021-01-03 04:47:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c05c40cfcf0eba9240ada6b94bb49abd SHA-1: 93b13a8c60b563052563fbd4143a25ab2a5da69d SHA-256: 5ec15817ce56b07e2229aec2bdf931ee3b22c2e170f01b0dbd416beff209f598
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/123?utm_term=patron+saint+of+healing+kidneys PDF link annotation
    • https://fojifipavubi.weebly.com/uploads/1/3/4/6/134618349/0d6d899cb9d.pdfIn PDF document text
    • https://cdn.sqhk.co/xakelafu/0IMWyKt/jazerufirimubapojale.pdfIn PDF document text
    • https://cdn.sqhk.co/pavujakorige/bUhiJic/jungle_fruit_splash_a_match_3_games.pdfIn PDF document text
    • https://cdn.sqhk.co/xasakeza/jg7Cafc/best_strawberry_ice_cream_cake_recipe.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/3257372.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/iegghbj/bowmasters_game_play_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuxime/pdf_to_word_software_open_source.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/467cd7e4-67cc-46a7-b41c-69a70faaf510/42990383161.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edffe4e0-da57-4af8-ab56-c5b4f00b2056/fuzenozow.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/group_assessment_form_for_students.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27579c5c-f016-4aff-bdc0-cf39c9ab36f0/dewinodupadikanusur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16b56409-2498-477a-b46a-707ca4abc350/wolizuda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54b24ac4-4fd4-4441-8c61-e2f7d2832b9e/83067312704.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b402f35-7e3e-48b2-a0c0-28b8c7705dfe/funny_animations_clean.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d20e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD20E 5336 bytes
SHA-256: 2d5ebcb11469e6861b32d77ad2087e9330ed9d6dab25e49661a04dba59a52d6f
font_01_sfnt_off0000e433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE433 11404 bytes
SHA-256: b1b12bc60957171b9b0ce9e1a66f2128985a31c25a5ca867416a3f923422febc

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