Malicious PDF — malware analysis report

Static analysis result for SHA-256 b484908a8b3fd389…

MALICIOUS

PDF

68.4 KB Created: 2020-12-17 00:23:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e88a1365bda1600aac9d515d43c1e68 SHA-1: 53fe118d0d3bbdf865070aa4c40c9001c7dcfbb6 SHA-256: b484908a8b3fd389c5e5297ab35cfc8187c5ed96f7dbe9cda43922b4b7b79f8c
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The sample is a PDF document flagged by multiple heuristics as malicious, including a critical finding for a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text fragments suggesting a lure related to 'cheat codes' and potentially an advance-fee scam. The presence of embedded URLs and the overall structure strongly indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffmen.ru/strik?utm_term=nba+2k13+cheat+codes+ps3
    • https://cdn-cms.f-static.net/uploads/4446773/normal_5f9d44679f5cb.pdf
    • https://tokemenar.weebly.com/uploads/1/3/4/3/134337898/fukopogomagewim-piniwawajanexeb-zuwavamuwedazi-zirumenimek.pdf
    • https://livadasim.weebly.com/uploads/1/3/4/3/134312527/3855988.pdf
    • https://cdn-cms.f-static.net/uploads/4384152/normal_5f937d79e1dfc.pdf
    • https://sunakolezapomuj.weebly.com/uploads/1/3/4/6/134698053/7976218.pdf
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/8677465.pdf
    • https://lufiwusogak.weebly.com/uploads/1/3/4/3/134319395/1947800.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc50419a3bf4b14abc377c2/t/5fca759ddc508f025019d92b/1607103903793/70942116568.pdf
    • https://uploads.strikinglycdn.com/files/e46e2945-e0a0-4ead-b903-861ce4a4b0e5/depeche_mode_a_broken_frame_full_album.pdf
    • https://static1.squarespace.com/static/5fc69c572cf09257bd930dfc/t/5fca6459cba3ec7529480ed6/1607099481570/creepersedge_public_hide_or_hunt_server.pdf
    • https://s3.amazonaws.com/rutufokedizon/76911835566.pdf
    • https://uploads.strikinglycdn.com/files/366af0ce-323c-4a4c-a467-428e24dc3afe/descargar_las_maC3B1anitas_gratis_para_celular.pdf
    • https://uploads.strikinglycdn.com/files/6ed68a37-d162-4671-bb45-462dd2ac55e2/81673453479.pdf
    • https://s3.amazonaws.com/nuxulikiwab/divajajesutonuwisaveruwev.pdf
    • https://uploads.strikinglycdn.com/files/b9566308-7967-458c-a0e3-7c8658f93a7b/7563970681.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_off0000cd18.bin
477180ff4b1cd8c3d66f84851ab882b02d4ba3813151ad8a005023d21a855afc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD18 5552 bytes
font_01_sfnt_off0000e006.bin
78acd745b882b486f37d8a4effcd9a0ba9fd35b60db3bec29b741a3ff35416cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE006 10748 bytes

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