Malicious PDF — malware analysis report

Static analysis result for SHA-256 374076a75eb27019…

MALICIOUS

PDF

80.7 KB Created: 2021-03-28 23:42:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9aada15a0f42d2f82fca9cd6627211f SHA-1: e2258c9a0bf93719486bf381969043ddef8e5d90 SHA-256: 374076a75eb270191c2394689bff79d8a7d32723fef6e3d66ca071f106bc4764
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' containing 21 links. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or a trojan. The embedded URLs suggest an attempt to redirect users to malicious or scam-related content.

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://jumiwimov.ru/strik?utm_term=dirt+bike+parts+usa
    • https://cdn-cms.f-static.net/uploads/4387226/normal_5fd1cf33875ef.pdf
    • https://cdn.sqhk.co/bupewazadufa/cgcl2if/free_halloween_wallpaper_for_desktop_background.pdf
    • https://cdn-cms.f-static.net/uploads/4384652/normal_604afc5736372.pdf
    • https://cdn.sqhk.co/libibajuzumu/Fghx04x/69948998111.pdf
    • https://cdn.sqhk.co/fegukajebaj/4jiOigM/zomezisomineledi.pdf
    • https://cdn.sqhk.co/pivokazi/iigjSja/58510352585.pdf
    • https://static.s123-cdn-static.com/uploads/4457318/normal_5feecdede31ba.pdf
    • https://cdn.sqhk.co/vekuperik/7iiZARR/md_sports_ping_pong_air_hockey_table.pdf
    • https://cdn.sqhk.co/gazegarov/gfyLggV/22005032809.pdf
    • https://cdn.sqhk.co/jigugabopu/gjYtIii/75288869649.pdf
    • https://static.s123-cdn-static.com/uploads/4490133/normal_6003f8f811c8a.pdf
    • https://cdn.sqhk.co/manuguwe/ehejaje/pivesupiwosiwijibef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pasobopupolom.rf.gd/fetije.pdf
    • http://ninoxubus.rf.gd/54901931604.pdf
    • http://jijetebum.epizy.com/vedalawope.pdf
    • https://94cb5446-44f7-499c-8ddd-8d9df3a2db3d.filesusr.com/ugd/9b9c26_c8a51be65b8b4fa0b60ceca708bea74a.pdf?index=true
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_99c76fdb26f54ad197bc5d92693cdfc6.pdf?index=true
    • https://fa886832-b9e3-4ce5-a98c-97da2614721f.filesusr.com/ugd/9f8050_ddbaa17dc7e643df9b2678d0d4816b2f.pdf?index=true
    • https://e791dc30-71fd-4519-a75e-453748eb9c32.filesusr.com/ugd/8a5fcf_49b333c685b54259b4228f3ca2cf9318.pdf?index=true
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_fec3018f1c8a46f3ab8e3b7664002469.pdf?index=true
    • http://tosivasode.epizy.com/6453801293.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_off000100f5.bin
97f79cafdab99ff075659f47f32c875effe4130aa2cc91521caa8a9c10f86963		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100F5 4984 bytes
font_01_sfnt_off000111f4.bin
02d54c6ee66aadda45bee75a99ccce5ecd05edcbc9d056b6b8e85a35fbe550e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111F4 10524 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.