Malicious PDF — malware analysis report

Static analysis result for SHA-256 d202370a9f01f3ff…

MALICIOUS

PDF

88.4 KB Created: 2021-09-14 06:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-04
MD5: 6fa83d509e81ac6bfd2c1af87a120fbf SHA-1: 4cbdd5dded863304e4faa943412272c02e51e71e SHA-256: d202370a9f01f3ff518a83558df01d280492a49b62cb7f32fa5a1f0b46cc0ba1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains, indicating a link farm designed to obscure the true destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a malicious tactic. While no scripts were explicitly extracted, the nature of the embedded links and the ClamAV detection as 'Pdf.Phishing.Trojan' point towards a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://abhinavabhishad.org/userfiles/file/29265897421.pdf In PDF document text
    • http://tehnicgaz.eu/files/file/40754598364.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/72067322379.pdfIn PDF document text
    • https://stdtekstil.com/upload/ckfinder/files/pazimije.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/samanog.pdfIn PDF document text
    • https://bibliotheque-des-arts.com/ckfinder/userfiles/files/44452609942.pdfIn PDF document text
    • http://werder-ritter.de/UserFiles/File/rezesufegizodawodakafazi.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/gekuwe.pdfIn PDF document text
    • http://yepuco.com/uploads/files/nibuxejanugolez.pdfIn PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/xebowikiz.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/sudebedejuditaze.pdfIn PDF document text
    • https://cherrychile.cl/cherry/uploads/contenido/files/88651174979.pdfIn PDF document text
    • http://xn----7sbezcba9a5aggb3j.xn--p1ai/ckfinder/userfiles/files/44669885240.pdfIn PDF document text
    • https://gikguamerica.com/userfiles/file/futixozexukijusowawugu.pdfIn PDF document text
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/futerupojutokijejolanili.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/45449304502.pdfIn PDF document text
    • https://luminex.pl/upload/file/lixuwovifiwetaw.pdfIn PDF document text
    • http://pcccphucvinh.com/upload/files/46316570974.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613453066c820---fumojegepo.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/52ba12d7027c38b6aedeb03de81b5bf3/20947796801.pdfIn PDF document text
    • https://tktravelkorea.com/FileData/ckfinder/files/20210908_C3F3FAC1182DF87E.pdfIn PDF document text
    • https://z87992961.com/upload/files/20210914035015.pdfIn PDF document text
    • https://skvely-kup.cz/files/file/65615332795.pdfIn PDF document text
    • https://kudamatsu.org/userfiles/file/8271358422.pdfIn PDF document text
    • https://kontiko.com/ktkweb3/images/upload/files/43530712112.pdfIn PDF document text
    • http://kxnjl.com/userfiles/files/ziwumigodadu.pdfIn PDF document text
    • http://rosniyom.com/userfiles/files/dixikifidavakabolagudoza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=my+sosh+androidPDF link annotation
    • 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://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_off0000f182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF182 19716 bytes
SHA-256: b3733d77b1fd4c5fcfcd735319070fa61075c97744f6a0b7d6ec249ffddbfee0
font_01_sfnt_off000124c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CDC 10176 bytes
SHA-256: a47da2a5493067ca09e239cda5f9e41d029cda69aa5d8089c83e41cc883079f5