Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9fe360fd956aa12…

MALICIOUS

PDF

71.8 KB Created: 2020-11-17 18:06:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 1ff9e02a4ce466fd2cd77adc0d51f0f9 SHA-1: db6138b2200b86d3e7120c7b574e3d9f1bc0f716 SHA-256: c9fe360fd956aa12344bd0fe95608987e28c9efb78013ff252de654f305b08af
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • 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=ver+vistas+mysql In PDF document text
    • https://wodedofa.weebly.com/uploads/1/3/4/3/134320626/7066249.pdfIn PDF document text
    • https://ribufesoguvas.weebly.com/uploads/1/3/4/6/134680119/gesoletiletozopusipe.pdfIn PDF document text
    • https://karozazosepi.weebly.com/uploads/1/3/4/3/134316788/1719488.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/foburadip.pdfIn PDF document text
    • https://kisotupojez.weebly.com/uploads/1/3/4/4/134493444/1347365.pdfIn PDF document text
    • https://tinuxitimo.weebly.com/uploads/1/3/4/7/134748051/32b1f3d526a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fibesezati/natomivovunabolul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a8324fb-4e19-458f-b0f6-9d497bb71275/marvel_coloring_pages_captain_america.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/16410815772.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17939d74-1d28-44a6-95b8-97261ba868f6/73425519538.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76fb35e8-b5b4-4a6e-b187-d35ece560ca4/keter_tool_box_replacement_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/street_fighter_unblocked_76.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/visepaxevobiv.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/26514723408.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 8

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_off0000c709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC709 5892 bytes
SHA-256: 7df647ce1900a6ce06fde359679bc75abb58f3c9efd067dc74be456c36ff54e5
font_01_sfnt_off0000db16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB16 5084 bytes
SHA-256: 5648068084a57fad4cea3bdd00700bcd04b38730a78a9ada3d57ee28227ad524
font_02_sfnt_off0000ec5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5F 11224 bytes
SHA-256: 5639a4ce12e2839c61f5c2e8ed450d0b01f68b9e5165d9a39eff9e9ca4ba09fa

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