Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee530bb8dc5e31c5…

MALICIOUS

PDF

65.2 KB Created: 2020-11-19 03:31:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2035c94d2b3bf5714195d4fc25e89f52 SHA-1: ee22fc2a62635564af60ef45fd6ff3fdb800f629 SHA-256: ee530bb8dc5e31c5855046164e829d6b69ccbecde3f636f415d06afbd81775e3
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to redirectors or SEO farms, indicating a phishing or scam attempt. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' strongly suggest this is a free-download phishing lure. The embedded URL 'https://traffset.ru/123?utm_term=schwinn+airdyne+ad6+reading+rack' is likely the primary malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/123?utm_term=schwinn+airdyne+ad6+reading+rack PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454682/normal_5fb340bc9457b.pdfIn PDF document text
    • https://nibojesuko.weebly.com/uploads/1/3/4/3/134329062/6116965.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404112/normal_5f9f0ac88e1f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5f87314f26ecf.pdfIn PDF document text
    • https://vuloribogisoso.weebly.com/uploads/1/3/4/6/134655424/ce51821183.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487623/normal_5faa3d0a47591.pdfIn PDF document text
    • https://kabijefilomi.weebly.com/uploads/1/3/4/7/134761935/sonefolufogegazop.pdfIn PDF document text
    • https://roromitekavu.weebly.com/uploads/1/3/4/5/134528712/090a330e7.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/kosipefojaw/48501587755.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/24220861304.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/quadratic_modeling_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/dojarabufe.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/armed_with_wings_culmination_hacked.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_off0000c260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC260 5508 bytes
SHA-256: 89fe3e13072d59c76976c7144625b7b54063d47d0ed8e739a639ea272b2072cb
font_01_sfnt_off0000d52d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52D 10264 bytes
SHA-256: e51bd08e30303ef44fef62e77d8bebc504d5173a042ed70d4a6170fc049cf1ae