Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e4dbf341108def6…

MALICIOUS

PDF

137.3 KB Created: 2021-03-14 03:25:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: caf1da5935416ae8194b03341dd9cf9a SHA-1: dba9129bb20f9f15fc1c37821e8ac0ea81c6ecfd SHA-256: 5e4dbf341108def689402040b507148a1d20707905fd2f563d39e6f2040ce08a
194 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document's structure and embedded links point towards an attempt to trick users into downloading further malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jacksth.ru/wix?keyword=james+leveling+guide PDF link annotation
    • http://tigafik.mygamesonline.org/jojek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384304/normal_60188d7526d8d.pdfIn PDF document text
    • https://cdn.sqhk.co/wasusoguba/gifjgAD/fositelamataku.pdfIn PDF document text
    • https://cdn.sqhk.co/gelowidabik/jifieha/gomuzidamo.pdfIn PDF document text
    • https://cdn.sqhk.co/dulemokel/gtckHib/66141179333.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387706/normal_5fee9a47bf542.pdfIn PDF document text
    • https://cdn.sqhk.co/wemukubiv/hf7MVhi/josaragutidudokinimopij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387920/normal_60342a54832df.pdfIn PDF document text
    • https://cdn.sqhk.co/sawijewabob/XjgH9KF/47198821375.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474470/normal_5fcd17e716345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406789/normal_600d3e4544c18.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458145/normal_6006e131be3db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485322/normal_6019f117a63bb.pdfIn PDF document text
    • http://jafoxidulez.mypressonline.com/card_management_system_in_banking.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6774c1ff-89bb-4a5a-8fa0-21ddf768e942/p90x_chest_and_back_video_stream.pdfIn PDF document text
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_31dc0ebf3d644076998d13e938645ea4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b457c4d-8ec5-44ac-a509-a6d10933300f/39453363232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c48826bc-0a68-4138-8c31-d5d86776947e/25583039751.pdfIn PDF document text
    • https://90e68d66-75cd-4f9f-aa76-03b1e6b67b4d.filesusr.com/ugd/324cd8_2ac0235161494f58b32352e53fab7b72.pdf?index=trueIn PDF document text
    • http://weparaxopulo.atwebpages.com/81937477384.pdfIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D148 4792 bytes
SHA-256: b1fd8f8263e726779a865346286acf183420edf6ce2b3a0b3b2eab7c93dd24cc
font_01_sfnt_off0001e174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E174 11800 bytes
SHA-256: 875ebe20350c99a0735b35b171e3cfa5ff807759091f22e0b81c985b6e3bbe0e
font_02_sfnt_off00020994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20994 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3