Malicious PDF — malware analysis report

Static analysis result for SHA-256 20772dda0c330ff8…

MALICIOUS

PDF

57.6 KB Created: 2020-12-24 12:16:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0d3b5444628a01efad44d06b190ead6 SHA-1: 124711c6b9b1741754945eada381bf632a1420ed SHA-256: 20772dda0c330ff84e520df9fe2424d2e5cc1f2f97835282232a409eda3d271e
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or SEO abuse tactic. The primary URL, https://traffking.ru/strik?utm_term=dog+fight+2+unblocked+hacked, indicates a lure related to a game, likely to deceive users into clicking through to a malicious site or downloading further payloads. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/strik?utm_term=dog+fight+2+unblocked+hacked
    • https://cdn-cms.f-static.net/uploads/4486060/normal_5fa94c2778e05.pdf
    • https://digewulafi.weebly.com/uploads/1/3/4/8/134882869/6624958.pdf
    • https://fategebedabeno.weebly.com/uploads/1/3/4/7/134718848/sokurinom.pdf
    • https://rogejizerabori.weebly.com/uploads/1/3/4/7/134763318/3354720.pdf
    • https://cdn-cms.f-static.net/uploads/4475406/normal_5fbd2f8ede673.pdf
    • https://rorezumi.weebly.com/uploads/1/3/4/5/134591247/xatozakesexusa.pdf
    • https://cdn-cms.f-static.net/uploads/4377401/normal_5fbdc0dfddd90.pdf
    • https://zivawopoxiba.weebly.com/uploads/1/3/4/3/134355714/9233281.pdf
    • https://supekekimut.weebly.com/uploads/1/3/4/8/134871395/xumebejepexo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/29f23f45-ea4a-4c6d-80ed-8eaec4b827cc/23824163296.pdf
    • https://uploads.strikinglycdn.com/files/bb374d77-66fb-4efd-bc89-4dfd0d5f6d58/lajazivuvusudiv.pdf
    • https://uploads.strikinglycdn.com/files/d17a7aef-faf8-4b45-8cc8-b959a8760fe4/acellus_world_history_1_answers.pdf
    • https://uploads.strikinglycdn.com/files/3f8afdf7-5b64-46fb-a54d-7b5e13b6ff29/63883890769.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a86f.bin
d18bcdfda1a584b7e4318ae73d58ff68f35633b2a7b4e525eb0d170db9c3aedb
pdf-font-stream PDF embedded font (sfnt) at offset 0xA86F 5344 bytes
font_01_sfnt_off0000baa5.bin
367c139fac1bc3fbad5f558f8f2a8932d6bf40bde1767ba4c8c9340e764873b8
pdf-font-stream PDF embedded font (sfnt) at offset 0xBAA5 9188 bytes