Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8701e6f4636a336…

MALICIOUS

PDF

68.3 KB Created: 2020-12-21 02:40:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e399bfdf79b11af88060a7686abc4dd4 SHA-1: 29692ee7fdb5868ce4c3ea28c9d30a357cb1ceee SHA-256: d8701e6f4636a336b9b072eb92d40686796c0c2e8d47f9001f29710b7a2be0ae
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. One prominent URL is https://trafftec.ru/strik?utm_term=hello+neighbor+act+2+crowbar, which is likely part of a phishing or malicious redirection scheme. No scripts were extracted, but the presence of numerous external links suggests an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://trafftec.ru/strik?utm_term=hello+neighbor+act+2+crowbar PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481402/normal_5fafa0bd6550a.pdfIn PDF document text
    • https://romagazep.weebly.com/uploads/1/3/4/7/134759296/gudavunitepena.pdfIn PDF document text
    • https://pibezenasa.weebly.com/uploads/1/3/1/4/131454503/gumezuxole_begafan_fopib_wavawakinumaju.pdfIn PDF document text
    • https://sisebafob.weebly.com/uploads/1/3/0/7/130776599/ea2252.pdfIn PDF document text
    • https://kirewigofe.weebly.com/uploads/1/3/4/3/134382955/84441.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6ef06ef-e02b-4019-9016-9f1180ce9663/zcode_line_reversals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bad9df20-de91-4a18-abe6-965028620868/46916321005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40162786-7771-4146-989e-edbe7666e05b/vagejadipuwelokuzojom.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/afl_fixtures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9093c9a-a592-4db9-a6cf-9e896c69cc3a/91900102274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4146b882-5384-40a7-abb1-7215fc8e833c/heiden_watch_winder.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/cuddl_duds_fleece_sheets_reviews.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe02643c02f22b9dd3d634/1606287973661/12372702080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ca75151-49a8-4bb1-9075-d4cdc1853b0f/to_toss_word_whizzle_answer.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DA 5208 bytes
SHA-256: 57ec9398b3d8163d0b4e99a1995239f2193fb3ec1f84f411cadb927667ec92f6
font_01_sfnt_off0000e29c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29C 9984 bytes
SHA-256: b38c69c3630a832bac86513355705ae1409b32d37227ba51ef1241c64f7c4269

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