Malicious PDF — malware analysis report

Static analysis result for SHA-256 d67e9cea9fe9f1d5…

MALICIOUS

PDF

82.6 KB Created: 2021-03-27 19:16:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec92c9e521ab2ad6f77b6cd722ca272a SHA-1: 761a52a96a67f771fc40cff0104b3ee82b09c3b2 SHA-256: d67e9cea9fe9f1d5dfdfe9064b055328f70148458470a4d0eee550403375d28c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains a large number of external links, indicating it functions as a link farm. One of the primary external URIs observed is 'https://pelibifir.ru/123?utm_term=cercle+de+la+forme+saint+lazare', which likely serves as a lure for phishing or to distribute further malicious 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://pelibifir.ru/123?utm_term=cercle+de+la+forme+saint+lazare
    • https://cdn-cms.f-static.net/uploads/4457279/normal_60381544658e8.pdf
    • https://momimuraw.weebly.com/uploads/1/3/1/3/131384495/zowofafoviwito.pdf
    • https://cdn.sqhk.co/madufuxenuw/sjhnED8/underworld_breach_adventure_cards.pdf
    • https://gibejeki.weebly.com/uploads/1/3/1/4/131438187/f92cc10249bfa1.pdf
    • https://cdn-cms.f-static.net/uploads/4484820/normal_6059cfec946c3.pdf
    • https://static.s123-cdn-static.com/uploads/4369768/normal_5feb9e313afca.pdf
    • https://cdn.sqhk.co/zarepowake/dVMieic/best_clipless_mountain_bike_shoes_for_wide_feet.pdf
    • https://cdn-cms.f-static.net/uploads/4480595/normal_60490aaba5bf6.pdf
    • https://static.s123-cdn-static.com/uploads/4387586/normal_5ff06e37c5455.pdf
    • https://cdn-cms.f-static.net/uploads/4388598/normal_60402cbf1a886.pdf
    • https://static.s123-cdn-static.com/uploads/4365624/normal_5fd0843c48091.pdf
    • https://static.s123-cdn-static.com/uploads/4493209/normal_5fdf98fabbc86.pdf
    • https://cdn-cms.f-static.net/uploads/4421939/normal_6017b0d52af51.pdf
    • https://cdn-cms.f-static.net/uploads/4445324/normal_600a11811ed15.pdf
    • https://cdn.sqhk.co/tijovomiv/ibhhJhe/killer_sudoku_solver_app.pdf
    • https://cdn-cms.f-static.net/uploads/4455196/normal_604dd48b3590b.pdf
    • https://cdn-cms.f-static.net/uploads/4387567/normal_6043878a8e63c.pdf
    • https://static.s123-cdn-static.com/uploads/4423443/normal_5fdd9bdf945e4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/3849f896-ae2f-48b9-9a3b-490c564efcdb/nibanalofusijaripe.pdf
    • https://uploads.strikinglycdn.com/files/ade6310e-08fa-4b8e-9563-7e7295a131f5/wepiveb.pdf
    • https://uploads.strikinglycdn.com/files/11dba620-2ebf-4ae0-a564-790ef5b3ce1a/falilorifo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f30f.bin
e73ecd31c81b0fdc83e5ad564ecda06850532b20908af8403efba93f6eb72ff3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF30F 5028 bytes
font_01_sfnt_off0001040c.bin
657cd88f3ff09f1acc28cc8a517350b4bbc4e9a261d20b43fdd6ce2cf0bce5bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x1040C 13016 bytes
font_02_sfnt_off00012d48.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D48 4324 bytes