Malicious PDF — malware analysis report

Static analysis result for SHA-256 d73780e28a74fab5…

MALICIOUS

PDF

79.3 KB Created: 2021-02-12 18:51:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: d2686c49f96d858100760d6a909565fa SHA-1: 49e1127b52f47462e0f42738c890c2c93882822a SHA-256: d73780e28a74fab5af4dc02eb839c6b00de568cfc877a1d97bcfe5fd5530719d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically classified as phishing or a trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malicious redirection attack.

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://baarspo.ru/123?utm_term=one+billion+dollar+whale+pdf PDF link annotation
    • https://kekoluborefox.weebly.com/uploads/1/3/5/3/135327445/ed31eb.pdfIn PDF document text
    • https://cdn.sqhk.co/gigemuji/ciaWAB2/anger_management_books_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/dugubupa/6Jjejd2/ginuburalidene.pdfIn PDF document text
    • http://milanbeachs.space/audio_to_text_converter_app_androids0mez.pdfIn PDF document text
    • https://cdn.sqhk.co/talidapato/1EggXw2/pukodekugevejuxeravetira.pdfIn PDF document text
    • https://kopezufotixese.weebly.com/uploads/1/3/1/1/131164020/6421a.pdfIn PDF document text
    • http://buyervannakupitvsem.xyz/tifuzonafozogekuxagelijixvf8m.pdfIn PDF document text
    • https://nodeseverew.weebly.com/uploads/1/3/5/3/135323512/wasupobut.pdfIn PDF document text
    • https://cdn.sqhk.co/tadawatimi/cig8kgd/nsw_train_timetable_sydney_to_wollongong.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/X8X5mja/lizejex.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/jozetej/brahmacharya_vigyan_free.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/59708212817.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/tovujejafuvelalitokavux.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/blaze_foley_movie.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE101 5208 bytes
SHA-256: f82e86951d1a1f5ab88d4ae5ed9c811a29e1ebf105a9527f366dd5ab70a1014c
font_01_sfnt_off0000f2ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BA 11572 bytes
SHA-256: cb6fa687c96da4bc164649656bc078cb01ad6ea47bf7a6a808ec2b1cf31e9a74
font_02_sfnt_off00011a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4B 16312 bytes
SHA-256: 975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15

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