Malicious PDF — malware analysis report

Static analysis result for SHA-256 db961a2210e2033e…

MALICIOUS

PDF

71.9 KB Created: 2021-01-06 22:24:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2322ee2897746eebdb93000be7b08767 SHA-1: b221a49b541587b62523f81b26b50873503a401d SHA-256: db961a2210e2033e23803a4bfe4770f45dd24dfc4fd3b7236268edd27d739da1
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. One of the primary external URIs points to 'trafftec.ru', which is likely part of this scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to drive traffic to malicious or manipulative websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=tu+aaja+mere+mahi+song+lyrics
    • https://cdn.sqhk.co/xinulezebi/hzhgsCl/89605668024.pdf
    • https://toroborelap.weebly.com/uploads/1/3/4/8/134867907/bosidomigonenut.pdf
    • https://cdn.sqhk.co/guxuboru/jicjdIY/facebook_portal_review_youtube.pdf
    • https://cdn.sqhk.co/nanubebebot/BhdgddM/5_below_locations_ct.pdf
    • https://kuvugelovusilu.weebly.com/uploads/1/3/4/4/134437140/6113853.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/vipinib/62377592567.pdf
    • https://uploads.strikinglycdn.com/files/9b123d14-3f3f-4790-b37e-d4e2cc9c8a4b/truck_inspection_form_template.pdf
    • https://uploads.strikinglycdn.com/files/4809640b-42aa-4141-bffa-2ed256988dbe/black_ops_4_classified_code.pdf
    • https://uploads.strikinglycdn.com/files/ff684e52-e94e-4418-9b1a-762957b896f0/29681414518.pdf
    • https://s3.amazonaws.com/lakadutof/glannon_guide_to_bankruptcy.pdf
    • https://uploads.strikinglycdn.com/files/a4eddd6f-4768-4146-8231-1299aaeca146/mother_earth_brewing_kinston.pdf
    • https://s3.amazonaws.com/dusubonifu/confluence_export_template.pdf
    • https://uploads.strikinglycdn.com/files/e8b3b90d-c241-4634-ba30-9803b141b592/jiwukuzasakekelimuzam.pdf
    • https://s3.amazonaws.com/nafibanefexex/emily_fisher_md_cincinnati.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce70.bin
510067b2e8f8ff294f99d990d401ac6c3ab1220073a2e8a95c7c8f78a51451d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE70 5144 bytes
font_01_sfnt_off0000dfc4.bin
7839af0537b922c9a740d23177e2fafa5fa87f7b094ddda897e839fffbf37de5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC4 10880 bytes
font_02_sfnt_off000104c6.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104C6 4324 bytes

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