Malicious PDF — malware analysis report

Static analysis result for SHA-256 121ac7d5ba28da32…

MALICIOUS

PDF

70.1 KB Created: 2020-12-15 04:15:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 740252489b954d6e46fad2788e191110 SHA-1: 980bfb15e0a78b28c3777ba901d83f0751f930fd SHA-256: 121ac7d5ba28da32b1835ff44b9b2f27f9e179a1959c1f41730ec3a78b3cadad
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many of which are likely part of a link farm for SEO manipulation or to direct users to malicious content. The primary malicious URL identified is https://traffine.ru/123. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit users by directing them to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://traffine.ru/123?utm_term=friedel+crafts+alkylation+of+phenol+mechanism PDF link annotation
    • https://tabodixab.weebly.com/uploads/1/3/4/5/134585887/wimopinu.pdfIn PDF document text
    • https://ranuxibat.weebly.com/uploads/1/3/4/5/134595997/4638642.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/5fc1d0d6bd14ff0dd2a325bf/t/5fc647c12dd96f5918c2986d/1606830019062/pumpkin_carving_simulator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c42e4897-8f45-46b6-b7ed-02e39cbcdfb9/29427236344.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18826c8c-30c5-445e-8a2c-45f3709a06df/62397378133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d991cfb7-d460-45c0-b1b5-895e89095c1a/54873514319.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20c04aba-59e0-4c8c-a209-271b18ea82d8/pobiboxumejupile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2405681b-8d19-4c54-aa31-9ae578696a85/28774322470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/547bc375-3bea-4069-ac40-fd9ebfd23d8f/zubisodefupe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dde970e-dd9e-4d49-96c1-b00029648c3b/pagesezeguvijalano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2a1b2a8-f809-4278-a39a-92360e6e62fd/i_am_number_4_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4be501e-a588-481c-b52e-47592087d42f/hadestown_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/569bfca7-96a0-479a-8c53-72c29e49db20/12341707205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/956ef45e-5ba1-4541-a01d-c5d4c95b2ba4/fegizafugobov.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c68c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC68C 5516 bytes
SHA-256: 2f290638f480019529af51ee65f82de81e79ffc2be811214ee37924ed755f05c
font_01_sfnt_off0000d933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD933 15716 bytes
SHA-256: bba1f91b5f95f70d57ed4c58c524a34e3fa058c29e6d1641c97103a95019329e

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