Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a66c3923579cb4…

MALICIOUS

PDF

66.8 KB Created: 2020-11-14 02:58:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 050d4d0dd20ced05cfd5b1e8090ea9ce SHA-1: 9b3ce3e68bf1bb2bfc461b035f9d350c783e200a SHA-256: 01a66c3923579cb491dc011c728fab4eec7a0d96269338ece04f8e967586f5d2
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 0.9998

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://trafffe.ru/strik?utm_term=constitution+usa+a+more+perfect+union+worksheet PDF link annotation
    • https://tejubodefi.weebly.com/uploads/1/3/4/3/134351051/volubebuxamizamusuje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420934/normal_5f96f647d941c.pdfIn PDF document text
    • https://rikidunojig.weebly.com/uploads/1/3/4/4/134488605/9054692.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/bituduxa_pefomaxabom_vapezis_temusinu.pdfIn PDF document text
    • https://togurekeve.weebly.com/uploads/1/3/4/0/134040335/xepulu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376099/normal_5f9255d1529b9.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/9838750.pdfIn PDF document text
    • https://menerixejujup.weebly.com/uploads/1/3/4/6/134605313/85304e96c.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/jevuxozazebazug/96122947983.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/79695143105.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/volodugibuxujevemutaxizak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e6957da-d20a-448b-89ea-9168501f45af/stick_ninja_games_for_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/kraus_antennas.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/grandlake_volleyball_club.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c784a819-c213-484d-a80e-4dec9beab54f/ripley_county_fairground.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/vosogotavitorafepa.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_off0000c851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC851 5284 bytes
SHA-256: b94633773e5ef023004c98a08d07fb775643b0934c91d330c6ee063e0660ad8b
font_01_sfnt_off0000da32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA32 10488 bytes
SHA-256: 1d52a60b56add66a0748983cb9190fabe1657de2512176b4c017d5bcfdea8eaa

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