Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62a96108ff4a1c9…

MALICIOUS

PDF

86.2 KB Created: 2021-06-27 00:01:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a462fb5d3b1a3817e8fa5069a145d962 SHA-1: c803bad18b4b2b5fa2b55207b2642d174bdfab30 SHA-256: b62a96108ff4a1c956d8950968708b320e8b379ca3e736d3eb44cf6c1645e070
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely to redirect users to malicious content or phishing pages. The PDF structure itself does not contain executable scripts, but its primary purpose is to facilitate the distribution of malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crysiq.ru/uplcv?utm_term=hdlc+in+computer+network PDF link annotation
    • https://vestol.bg/files/file/34866994942.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/vekokofamuvewu.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ca1983f08---51076018850.pdfIn PDF document text
    • http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/dizibibusufuso.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/2heps49o636bir0k8i0bhvjalu/noxagemikafixuredeto.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/resofukovaref.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/lapuwawaniwulamoj.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/7fe40b4f13b9720b34af69dedc0321be/jakebenubu.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/5ca2ac13b09279ff55e780e337a95271/mezebefapawaripavogakewu.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/26439701733.pdfIn PDF document text
    • http://chhsclassof70.com/clients/1/1f/1f6d1b94cf555b90b9f410dfa82aea5f/File/webejudi.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d99f81be20---90584407299.pdfIn PDF document text
    • https://nhachoxebus.com/upload/fck/file/wedajodiketawanedowu.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/9b3b399ce6ef1c80959287d879a8c54e/14235422840.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/de354218f8b3420e76f35d511d632d1f/fidaveniwogolowelu.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/6gna3tfk1tfkff7bnp6e4f2p2k/pejelubuxemoku.pdfIn PDF document text
    • https://aradmissions.com/ci/userfiles/files/tolosaxuwexis.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/d7fb090e898cef143864ba143162d085/89282150420.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/nepamixojuwax.pdfIn PDF document text
    • https://sogelec-eng.com/files/ckfinder/files/wonirisoresojus.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d21683768054a8702651fef63498bd28/gokivava.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad85dce5815---kixokedesutuvuzezajekufop.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/c57c01ef96e16e61407c9ff5b6b7a0ce/70679853766.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF196 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A8 16408 bytes
SHA-256: 49ef90d628f5d25a15b5bd498e631d27dd94cf5f0c23f5d383fa022552104951
font_02_sfnt_off00013376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13376 10612 bytes
SHA-256: 982fce7fd6fb7707ac29da66049bb428ba154cd8d6760a747a38b01400eb3d83

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