Malicious PDF — malware analysis report

Static analysis result for SHA-256 232b500128613210…

MALICIOUS

PDF

107.5 KB Created: 2020-11-10 22:54:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 677cf723062a8eddb8ad086bb6efb980 SHA-1: 53c746217ca92a22773a0ab8fc5c25d218eb63f7 SHA-256: 232b50012861321045c9dcce29257184c8ace5f574f10290004698a0eb94bd11
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The presence of embedded URLs and the heuristic firings suggest this document is designed to lead users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://ggtraff.ru/123?keyword=jedi+consular+shadow+guide
    • https://waxojokizubow.weebly.com/uploads/1/3/4/4/134482073/3095168.pdf
    • https://cdn-cms.f-static.net/uploads/4383917/normal_5f9509cb8f390.pdf
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5f8b2b4b8a073.pdf
    • https://cdn-cms.f-static.net/uploads/4387711/normal_5f96869ec8f29.pdf
    • https://cdn-cms.f-static.net/uploads/4393370/normal_5f913137ca539.pdf
    • https://mosagalalevo.weebly.com/uploads/1/3/4/6/134668437/jufoloxumive-kejexosidu-solopafetodeta-pixavabigot.pdf
    • https://cdn-cms.f-static.net/uploads/4415964/normal_5f9c2c5ee755c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wizuluworafid/msr_whisperlite_international_manual.pdf
    • https://s3.amazonaws.com/zamuriza/25941986557.pdf
    • https://s3.amazonaws.com/bunobu/the_complete_photo_guide_to_cake_decorating_free_download.pdf
    • https://s3.amazonaws.com/vigevot/yela_jumptown_location.pdf
    • https://uploads.strikinglycdn.com/files/e2c15f5b-2b03-44bb-980b-3238fc26ac0e/gikuluxixurunewizego.pdf
    • https://uploads.strikinglycdn.com/files/c77f70c6-6467-4ea1-89aa-e815a81eba95/usmc_promotion_manual_2019.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_off0001671c.bin
89a4ede7330c94a8ddc7830036be51ed94eba183b961da68c565aeb2849a7f1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1671C 5280 bytes
font_01_sfnt_off00017916.bin
ea69e32e97d544b75336b1ee51a4bf8e30f33ed23d8c18dc95de77b53e889376
pdf-font-stream PDF embedded font (sfnt) at offset 0x17916 12020 bytes