Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc045171a265a24b…

MALICIOUS

PDF

69.5 KB Created: 2020-12-14 18:29:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 499fb408a57d2c24df0a7eabe9b53b71 SHA-1: 96984402fc8235f57bb12c8ec8c5af7cfee0bc6f SHA-256: dc045171a265a24b0986baf93665c6e6f307d3b5bdbad570a6d88edcb896321c
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body is heavily obfuscated and contains no discernible user-facing content, suggesting its primary purpose is to host malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ggtraff.ru/strik?utm_term=plural+of+life+in+english In PDF document text
    • https://ronupajowosoza.weebly.com/uploads/1/3/4/8/134871490/91822b2508.pdfIn PDF document text
    • https://jawibonudinozof.weebly.com/uploads/1/3/4/5/134584949/pozinubeme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484376/normal_5faa362633f1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369166/normal_5fcda05ca30f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379474/normal_5f9f922f3b5bb.pdfIn PDF document text
    • https://xomitemekebok.weebly.com/uploads/1/3/4/8/134881854/nazeluzolezuw-zixunuded-luzajimimikerod-sezuvofe.pdfIn PDF document text
    • https://bexusisase.weebly.com/uploads/1/3/4/5/134596812/pelajonobebafuv.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://static1.squarespace.com/static/5fc4e10e2e34347c705dc52c/t/5fc5bb6af8cdb769c6aa054d/1606794090918/record_of_lodoss_war_wiki.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/sapozogez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/082d6fb1-8846-4f08-a2a5-e7b96b20e7d1/97160111576.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

Related samples 3

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC77C 4832 bytes
SHA-256: 8ce612674cfbf554ba76309da880fecec5b5111b4638caa6df0625ca09e596e4
font_01_sfnt_off0000d7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D5 10548 bytes
SHA-256: ad206f06c2469a0b82be814b8aa02906b09106fc7298c464fb4f61a8bde0bfb1
font_02_sfnt_off0000fbad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAD 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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