Malicious PDF — malware analysis report

Static analysis result for SHA-256 8571d2ababd60a2d…

MALICIOUS

PDF

87.6 KB Created: 2021-07-16 09:26:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 7b7ed8cddde6335a74cb682d6b09228d SHA-1: 5dc37eb5ea8e05191acf8b1ed7efd326ea2e9d3e SHA-256: 8571d2ababd60a2d2f642424c54a479f3e80a8e76fdfa30901b3f1e8237cfcb8
196 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on compromised WordPress sites, directing users to download a file. The 'ClickFix' heuristic indicates the document likely attempts to trick users into executing commands, a common social engineering tactic for malware delivery. ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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 http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/bb454f06aa5be5b872132a127a9f0780/bobitesemuzug.pdf In PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/hdikitsguu9rr4tcdt2hcsp6s4/wisajitapimaxutoxuwu.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce8b983ad8---26164703541.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/99750901174c72bff3f822b74edccdcb/jidunuvitozuzilozipasen.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/jutukewuwakobevekovedemuk.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/66b75572088a1ed8e13b60f2e5e45d73/xisubapofoxaritinupa.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b437f984b49---dewawoxutowojewu.pdfIn PDF document text
    • http://ngocvietbungalow.com/upload/files/kegosilerutavadusefin.pdfIn PDF document text
    • http://vds-construct.pl/userfiles/file/36819585836.pdfIn PDF document text
    • http://verypool.cn/images/upload/File/74532285722.pdfIn PDF document text
    • http://deckdreams.ca/clients/3/34/34055ef41782f8f15ebf372c1e39ecad/File/dubotozebabotavejofa.pdfIn PDF document text
    • http://keyflounge.nl/userfiles/file/pajozejivowego.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/89eae23de7c74144a8e57314f77c1589/gubutu.pdfIn PDF document text
    • https://studiopros.com/userfiles/file/In PDF document text
    • http://www.asap-recruitment.net/upload/file/45124969712.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b7cc9872b51---73080230478.pdfIn PDF document text
    • https://simplehome.ro/ckfinder/userfiles/files/razix.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/zunivaxobezufezejixozukup.pdfIn PDF document text
    • http://haniltm.kr/upfiles/editor/files/nasojeme.pdfIn PDF document text
    • https://tidaksusah.com/contents//files/37092955987.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/k5qh53v36uhmvvj9cn6be9vbk0/26669085778.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/48413094570.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/f812e96090e0fe9b6844874978d330d8/75469239408.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa4b2f370e---53876815587.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/2d53cb3fcdb09ec9a245caa175570a05/rodatol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=download+screen+recorder+for+windows+10+64+bitPDF 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_off0000ed51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED51 17976 bytes
SHA-256: cf028ed919f0f054b5f3fee139474d957933715962219a1d47421cfde3f63db7
font_01_sfnt_off00011ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000134b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134B8 11116 bytes
SHA-256: 3dab7a35b24f93d2a83ab6b209c3c916b84d32589fa06d1e9d729db46d0500d4