Malicious PDF — malware analysis report

Static analysis result for SHA-256 04c076cf238e7369…

MALICIOUS

PDF

71.6 KB Created: 2021-01-06 07:56:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0a03440b5a8bc42a6b60e91aa936f806 SHA-1: a2946ad2b9ab08344dc05fafc7d5fe1b9a80a262 SHA-256: 04c076cf238e7369210578916dfd43c6a643886783fac99faa278d028e23b1bf
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://traffnew.ru/aws?utm_term=gmat+official+guide+2013+pdf+free PDF link annotation
    • https://jijibaduwa.weebly.com/uploads/1/3/4/4/134495912/3593258.pdfIn PDF document text
    • https://cdn.sqhk.co/digiwejasipu/lDjaiiF/rich_scary_granny_game_horror_mode.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454682/normal_5fc3a6a92fb8f.pdfIn PDF document text
    • https://cdn.sqhk.co/nalawanuxa/3djjiGI/timalutumivuzaj.pdfIn PDF document text
    • https://luxapojago.weebly.com/uploads/1/3/4/3/134327771/6533068.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389585/normal_5fab663151327.pdfIn PDF document text
    • https://cdn.sqhk.co/fijajiles/eieihha/traffic_report_near_me_i10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468563/normal_5fc7d2721b022.pdfIn PDF document text
    • https://xakebugus.weebly.com/uploads/1/3/4/0/134018628/winosozeloxo.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/gj3hfSD/restaurant_story_neighbors_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450631/normal_5fda545d2a128.pdfIn PDF document text
    • https://cdn.sqhk.co/dakuwuwuzije/jeifjbh/wingstop_flavors_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/biwufudi/gcifWjj/kodore.pdfIn PDF document text
    • https://cdn.sqhk.co/pemiduwegam/gfxDjgN/nabovute.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/ae6b9b90-e6a8-4c2b-8189-34ae755a8312/bajajadazoku.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_off0000d6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E1 5816 bytes
SHA-256: 9faeb88ced5d39543424ee5e0f74c7b294270b2c005a72cda53be8eddb1a1a69
font_01_sfnt_off0000eaa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA8 11548 bytes
SHA-256: 795868c57a5c000c65ed99e17acac3a57feab8471d5d07f43ef259f5eb712a77

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