Malicious PDF — malware analysis report

Static analysis result for SHA-256 df7effc35cb108c3…

MALICIOUS

PDF

65.0 KB Created: 2020-12-16 20:54:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e40c17d7ce629bd8c3f54c38a1476ab2 SHA-1: 9d3d686020b8bc76b01e3354757cdb51234f55d2 SHA-256: df7effc35cb108c347ec8b37d7e88a91efd9c9523c601240f5bf390e771b1dd5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing attempt. The primary URL, 'https://trafficel.ru/strik?utm_term=diagrama+de+ishikawa+pdf+libro', appears to be a lure for users searching for a specific PDF, likely leading to a malicious payload or phishing page. No scripts were extracted, but the PDF structure and numerous external links indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://trafficel.ru/strik?utm_term=diagrama+de+ishikawa+pdf+libro PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411490/normal_5faaf2c31604e.pdfIn PDF document text
    • https://dijumigomeruke.weebly.com/uploads/1/3/4/3/134309809/xibivezavalegeto.pdfIn PDF document text
    • https://razesupimo.weebly.com/uploads/1/3/2/8/132815812/0cc865.pdfIn PDF document text
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/fipaxudobujeful_dukufawumep_vakidevelelugug.pdfIn PDF document text
    • https://ririzunok.weebly.com/uploads/1/3/4/7/134712782/07416.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457302/normal_5fcd34b706848.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc77f6f579eee3ae06e1abd/t/5fd6bf9de5ac58289630b369/1607909277432/63068364480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14b00a03-71cc-4843-85a0-a1bfca0c63f9/casio_keyboard_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c82e13f-a40b-43d4-84db-a3c2d390e2f6/lancer_rpg.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc56aeda5bc066edfc3e318/t/5fceb3aec9e098024028305c/1607381939178/jumediwe.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_off0000c101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC101 5748 bytes
SHA-256: cf834a097e955e682035d3101c95723041ffc6a10b8b03f622c7f28d160ddd64
font_01_sfnt_off0000d47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD47E 10192 bytes
SHA-256: a1ad042c812ce7264ecb5fb6b6b7b114eb692885e89d2d1304effde5de84b2a3

Open this report in the interactive analyzer, or submit your own file for analysis.