Malicious PDF — malware analysis report

Static analysis result for SHA-256 107ebdd4bc510c87…

MALICIOUS

PDF

62.2 KB Created: 2021-01-15 00:00:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f6f8990e2b777c532ea3ef12d9bbab4d SHA-1: 92260811ee9f2cd6bb183c4e5f51f79561a0077f SHA-256: 107ebdd4bc510c87d7e46f3f82b0cffc3d490f0d8e54dcad0117c3d44a21cd6e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, characteristic of a link farm used to boost SEO or distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URLs likely lead to further stages of the attack, such as phishing pages or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/aws?utm_term=hp+data+protector+interview+questions+and+answers PDF link annotation
    • https://suretazusidik.weebly.com/uploads/1/3/4/0/134012564/5980294.pdfIn PDF document text
    • https://cdn.sqhk.co/manowipete/haicxig/73044172020.pdfIn PDF document text
    • https://rizafoxuz.weebly.com/uploads/1/3/4/8/134852064/094dbe4c26f.pdfIn PDF document text
    • https://cdn.sqhk.co/dufukeraj/YqiigeG/66912923985.pdfIn PDF document text
    • https://cdn.sqhk.co/weruvewo/id8gfgc/drawing_board_game_cards.pdfIn PDF document text
    • https://reropazorulofo.weebly.com/uploads/1/3/4/4/134437501/robujemipena_mofageten.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/dhdVsjd/carve_pencil_art.pdfIn PDF document text
    • https://cdn.sqhk.co/samigimas/Clgcie6/88213404075.pdfIn PDF document text
    • https://rozolabo.weebly.com/uploads/1/3/0/8/130814594/jexuzizujesutas-kofesi.pdfIn PDF document text
    • https://cdn.sqhk.co/pofaxiniraz/hhcelhc/mlb_schedule_2019_espn.pdfIn PDF document text
    • https://sukopowe.weebly.com/uploads/1/3/4/4/134499194/kutilugugozuximosaje.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/bisiku/mojapejewowurowomabaj.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_off0000b7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7E4 5272 bytes
SHA-256: 145f1c0bda83581205cbdaf3ad1d10fa5a489f379d8f8d13d3c672ebaf5d4bf6
font_01_sfnt_off0000c9f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F3 10060 bytes
SHA-256: 6d5ad72df27a63ba57e9e5c571a5caccb9b4a2c0fec7b0655a626d15ce096ceb

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