Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf800e6cc55c4cb6…

MALICIOUS

PDF

62.1 KB Created: 2020-12-25 16:41:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cdb7f92836bd83a023e89ec76cf9c55 SHA-1: d4746e00f7083068191ad68285437ace02d08284 SHA-256: bf800e6cc55c4cb61d3b44e635fd06e0b890295bae32a1607e145e5e2c2f80ba
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of a large number of external links, including one pointing to 'traffnew.ru', suggests an attempt to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/strik?utm_term=extreme+car+simulator+2016+android+2.+3
    • https://vaturelola.weebly.com/uploads/1/3/4/7/134704713/f5e90f5.pdf
    • https://cdn-cms.f-static.net/uploads/4383913/normal_5f903b3bcbadf.pdf
    • https://static.s123-cdn-static.com/uploads/4477626/normal_5fcacbc635db2.pdf
    • https://static.s123-cdn-static.com/uploads/4368750/normal_5fc436983bda6.pdf
    • https://static.s123-cdn-static.com/uploads/4458840/normal_5fccb5803c901.pdf
    • https://static.s123-cdn-static.com/uploads/4480581/normal_5fded1e69275b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/489894ad-d1d4-4df5-b527-f1f4771d88d7/xipopavudanujew.pdf
    • https://uploads.strikinglycdn.com/files/540742ae-9e44-435a-8687-6fe638e916d4/tiled_map_editor_online.pdf
    • https://uploads.strikinglycdn.com/files/5e7849f3-08b0-4065-8afc-16deed55ba4d/rugowamal.pdf
    • https://uploads.strikinglycdn.com/files/a0d51e32-5f66-4677-9429-ad1bc178aa06/belly_dance_outfit_name.pdf
    • https://uploads.strikinglycdn.com/files/86b11f3c-3963-4fe8-a4de-cd294d6f90ea/pidoxawirizu.pdf
    • https://uploads.strikinglycdn.com/files/7f10e650-ba55-4b2f-a51e-1275d427c18a/vip_222k_manual.pdf
    • https://uploads.strikinglycdn.com/files/907f39a4-731b-4dd8-a419-c747892bf7ad/asylums_erving_goffman.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_off0000b436.bin
41ab81426e9509ef4924c2b6e51b8304f479ccd81e030ab9427d7ed4aab41a2e
pdf-font-stream PDF embedded font (sfnt) at offset 0xB436 5788 bytes
font_01_sfnt_off0000c7d9.bin
e4b5628e0da8e6c96e35017252088d332e6a1517acb59eaf87998806a08fe250
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D9 11140 bytes