Malicious PDF — malware analysis report

Static analysis result for SHA-256 9365cc143ab3a854…

MALICIOUS

PDF

69.0 KB Created: 2021-01-10 09:09:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0c977c44ef56d2b63909e81a63e2ee3c SHA-1: e1d86b119644d6795ec074d0a64e6897b4d99ff7 SHA-256: 9365cc143ab3a854f47356161fbbd6d7e25816d3e5187e114bc9307b46149c8f
184 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 finding for linking to known malicious redirector infrastructure. The document contains a large number of embedded URLs, many hosted on disposable domains, which likely serve as a link farm to distribute phishing content or malware. The ML classifier and ClamAV detection further support the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://gettraff.ru/aws?utm_term=electrical+learnership+interview+questions+and+answers In PDF document text
    • https://site-1083678.mozfiles.com/files/1083678/environmental_law_in_south_africa.pdfIn PDF document text
    • https://site-1172210.mozfiles.com/files/1172210/baked_catfish_recipes_in_foil.pdfIn PDF document text
    • https://site-1084156.mozfiles.com/files/1084156/wipemapadunibepepo.pdfIn PDF document text
    • https://site-1167954.mozfiles.com/files/1167954/canada_simulator_2_close_to_call.pdfIn PDF document text
    • https://karinerojefemof.weebly.com/uploads/1/3/0/7/130775135/d48bace8.pdfIn PDF document text
    • https://site-1179234.mozfiles.com/files/1179234/42358120242.pdfIn PDF document text
    • https://site-1173589.mozfiles.com/files/1173589/gusun.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/heofijW/subway_simulator_3d_mod_apk_v2._2._0.pdfIn PDF document text
    • https://site-1179563.mozfiles.com/files/1179563/agent_z_and_the_penguin_from_mars.pdfIn PDF document text
    • https://cdn.sqhk.co/segenoliz/6iigeje/mitubosaxal.pdfIn PDF document text
    • https://site-1168501.mozfiles.com/files/1168501/69405193859.pdfIn PDF document text
    • https://wugepugozufov.weebly.com/uploads/1/3/4/7/134744675/pakaxafomomilodo.pdfIn PDF document text
    • https://site-1171554.mozfiles.com/files/1171554/yellow_pages_business_sign_up.pdfIn PDF document text
    • https://cdn.sqhk.co/rosomugimo/jajgkds/zombs_royale_season_15_battle_pass.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2BA 5396 bytes
SHA-256: 059539ce2e5e9c55d0180a29160421eb27a156d5fdb6141a370392f7c55b15e5
font_01_sfnt_off0000e522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE522 9796 bytes
SHA-256: ce3b30756f22a9265b0a02ea93ac263f328b069108b09195b065f06af7e5c442

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