Malicious PDF — malware analysis report

Static analysis result for SHA-256 b174c634bd919237…

MALICIOUS

PDF

67.5 KB Created: 2020-12-21 10:42:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4b1cd1f021015ed2984f03e7ad512685 SHA-1: 19e33cc1e18194f30eb966b17c43aee9fc8375fe SHA-256: b174c634bd919237fceefcc0f89d0f3374dc7b7911a8e46731b49d6368da99fb
156 Risk Score

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, exhibiting characteristics of a phishing or link farm distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, with one pointing to 'https://traffset.ru/strik?utm_term=drag+racing+tree+tattoo'. While no scripts were explicitly extracted, the PDF structure and the high number of external links suggest an attempt to redirect users to malicious or spam content, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/strik?utm_term=drag+racing+tree+tattoo PDF link annotation
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/jofobafe.pdfIn PDF document text
    • https://zidovularirijap.weebly.com/uploads/1/3/4/7/134718784/xuvavazemalowa_kumolexidupe.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/5ca173cd-e550-40c2-b9fa-c3636b3a9ab5/jugazogojomoruvifijosotut.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0fe2417e7202640eab110/t/5fc18b3961e25426e1728534/1606519610367/fapijexaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2994af75-ab06-4f4f-8890-7c8a3cc2e84b/40788151692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ac61e8d-0c0a-41c9-85c7-0aecb1528ebd/gaxuxukurakiwu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc532e1bda9c57a97da3ebd/t/5fc7e61ee47f8a709986046b/1606936095427/gekimasumebuzagoguf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c250dae8-2b90-4aaf-8997-3150481ef7db/4069755716.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2dcdd8ef7301f8b1d95ab/t/5fd1652f87bef85997e0b569/1607558449579/34844364609.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09832765-6e42-48cf-8cb6-8574ad89b10c/82469809375.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fde8bd64ad8390d8b778f30/t/5fdf1a9c7f4e6a33672f6e09/1608456860639/netufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34987967-6c2d-41c4-bf12-b453cf2d4c3e/rofefijenalekiniv.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fde95ce5b7bc966055f9f1c/t/5fdf43ca42c0045a330b3829/1608467403830/zagozelurejubosad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rabilividobakomitunaxizug.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_off0000cdab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAB 4756 bytes
SHA-256: 14abe98112eb54dd46185c93095363d8c723564236897dcf49ef5f74bc9cef17
font_01_sfnt_off0000ddf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF1 10504 bytes
SHA-256: 7738f7fc116f0bea500e88b6a205c8a8ef70d44676894165881d202571c98e48

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