Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a3baf3e49c49c25…

MALICIOUS

PDF

71.1 KB Created: 2021-05-28 07:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93c264b108ff56017bcbb279b5701ea1 SHA-1: d73e0d0eefa3dbf9cb4c7c9d419471747166cffc SHA-256: 2a3baf3e49c49c257fc4ee1ba8e8d954662b04f7b1226c98c2ede24da7eab473
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it is part of a link farm designed to redirect users to malicious websites. The primary URL, 'https://gimoguvi.ru/strik?utm_term=recep+ivedik+4+indir+1080p', appears to be a lure for downloading media content, which is a common tactic for phishing or malware distribution.

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://gimoguvi.ru/strik?utm_term=recep+ivedik+4+indir+1080p
    • https://nokiziwevapof.weebly.com/uploads/1/3/4/5/134507241/6664063.pdf
    • https://cdn-cms.f-static.net/uploads/4450634/normal_600afc4831ece.pdf
    • https://bifitulodagox.weebly.com/uploads/1/3/6/0/136081839/savobidifep-xadaget-kobilutafuzud-lelepus.pdf
    • https://vipinilanevam.weebly.com/uploads/1/3/4/8/134873552/gevalodu.pdf
    • https://cdn-cms.f-static.net/uploads/4480582/normal_601ee4a6c3c67.pdf
    • https://cdn-cms.f-static.net/uploads/4496402/normal_6035e070f3241.pdf
    • https://cdn-cms.f-static.net/uploads/4471706/normal_604b44edf2f64.pdf
    • https://cdn-cms.f-static.net/uploads/4454809/normal_6035696333068.pdf
    • https://cdn-cms.f-static.net/uploads/4464302/normal_603219d28fddd.pdf
    • https://cdn-cms.f-static.net/uploads/4368976/normal_6033920d63636.pdf
    • https://cdn-cms.f-static.net/uploads/4457014/normal_602788bba7be5.pdf
    • https://static.s123-cdn-static.com/uploads/4383304/normal_6005f4c326273.pdf
    • https://static.s123-cdn-static.com/uploads/4479688/normal_5fdcae85eda72.pdf
    • https://cdn-cms.f-static.net/uploads/4378628/normal_604cfeca333c8.pdf
    • https://dowazulipogopu.weebly.com/uploads/1/3/4/3/134322731/janavilepimazu-solaweregatugo.pdf
    • https://cdn-cms.f-static.net/uploads/4368471/normal_600dc03211302.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5b9a573e-01fb-47b8-a817-5ca9e4047c15/fingerstyle_guitar_chords_for_beginners.pdf
    • https://uploads.strikinglycdn.com/files/47567a86-5406-49af-bde6-08fa892e5c25/jotavoz.pdf
    • https://uploads.strikinglycdn.com/files/b83d2a07-fbcf-4001-aac7-c785d7f03174/10208938583.pdf
    • https://uploads.strikinglycdn.com/files/df230eb3-4b4e-4e4e-ab53-c4446c816687/pagimumeke.pdf
    • https://uploads.strikinglycdn.com/files/e8886dba-7b0b-4533-ac53-dab5d3d32583/what_receivers_work_with_taranis_x9d.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_off0000d5f1.bin
6b6c84b03edc8458db637a91b01fa39b2f1b043097ac441d85546ce7ee842fc8
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F1 5256 bytes
font_01_sfnt_off0000e805.bin
92fa2cf092d2d99c6706a2f75009d1d30c6357a6a492be356323001d109f13ea
pdf-font-stream PDF embedded font (sfnt) at offset 0xE805 11956 bytes