Malicious PDF — malware analysis report

Static analysis result for SHA-256 e39a393a118944a0…

MALICIOUS

PDF

128.8 KB Created: 2021-07-16 08:37:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 967690bc9e08caa1fb147a334e2e056a SHA-1: 2126b4b833baa74a828a435ebcaab45a2e271108 SHA-256: e39a393a118944a0291ca4c1ce68c80dcce4ba16cb4d6245665a4b2e19917587
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://allytemp.ru/uplcv?utm_term=plenary+indulgence+for+the+dead PDF link annotation
    • http://gwhs79.com/clients/867100/File/tasafil.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/2f198eb7d43ff995425df1ca7439e5bf/wiguzezovefunexunolibusi.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/fosiloferuxesuzuz.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d8a21e7cd---bijuzuvepenujupesiluxufax.pdfIn PDF document text
    • http://valleypainclinic.org/userfiles/file/xuboguwasigobesewej.pdfIn PDF document text
    • http://cuoredicane.it/userfiles/files/nadusedesikawujonun.pdfIn PDF document text
    • https://autopratichesas.it/file/48519636453.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/77773316808.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0a157289c---40498598743.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/cq5pv1i22fj1v2hj3ft2ugtsk4/ketejadalexokiwurax.pdfIn PDF document text
    • http://614move.com/clients/4890/File/80458537882.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1607e724e9c747---fevakukimimuxonadevudugag.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/k48ut12n7okmmf0o4hlv0cl6ri/76234423637.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/laxuzutaxer.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/82caebbf347d62a2cd281987d7d2c781/vulixiziridemibixivus.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/98027087247.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/94533863214.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/e038c212c73933a01346a38a9bf87a35/fovikidiwelixet.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adda01c3de2---jabufudofixevufo.pdfIn PDF document text
    • http://pcccphucvinh.com/upload/files/65955338585.pdfIn PDF document text
    • http://thermogroup.ru/uploads/files/sakipiginopuwirote.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name//files/45548060708.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001733c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1733C 10804 bytes
SHA-256: 9599304bc0197c46bda00258d717e7b048716e1aba45a75052089362ff6d7454
font_01_sfnt_off00018bdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BDD 16096 bytes
SHA-256: 4ba2f64648f3913d62e340dbcfb60868d09d2a275a626c0843c73eb1759bed3a
font_02_sfnt_off0001a120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A120 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001b932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B932 23744 bytes
SHA-256: e5c4cfcb62f03a60867f9ddfe5d62610721cbcf0c575662bb79b5ea9e97c3c54

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