Malicious PDF — malware analysis report

Static analysis result for SHA-256 691e6e515a8b5d82…

MALICIOUS

PDF

93.1 KB Created: 2021-06-27 23:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: dd52b357d794a66ee5052c550786f9e9 SHA-1: 7891c53ca0453f612ed50501e179c7ed85100bdc SHA-256: 691e6e515a8b5d82a5652268825e8b607ea0902970f6c999868ecec729b82502
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to potentially compromised WordPress upload directories and other disposable hosting. The primary purpose appears to be directing users to malicious content or phishing sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/5pl0cbslpll78jlblgabfutbu1/32863973332.pdf In PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/18b1b1cb92af8ce7e7da813a917f976a/17911617406.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/lslvlbo53krnh8l1asmvf1ld7i/77657176370.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/kuwetov.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/f8e2d29947e4527330f2da2d25b03416/46372790196.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd94f22fca---lisevofesadorijisikedajo.pdfIn PDF document text
    • http://charivne.info/images/file/vumalegelimafetowasiram.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a05262a5be3---gidixuro.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a208028f120---89800728362.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/caq075dgf1qj7pij6juoembrd5/sukadarafumoki.pdfIn PDF document text
    • https://welltowork.org/wp-content/plugins/super-forms/uploads/php/files/ca787860670558b5696a5e34efb46f4a/92770629561.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/73380291051.pdfIn PDF document text
    • http://drthchowdary.net/userfiles/file/39885259424.pdfIn PDF document text
    • https://lncl.org/ckfinder/userfiles/files/rafofetogebazuposusine.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081432d4b4df---mibadizazujirizawalemo.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/in3p7t3bdpqpqh8600479fmren/88856043769.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/d5e0a8d206b23012df3af079885678e4/musofedive.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a16b27155d---seridilirasutomux.pdfIn PDF document text
    • http://atonoserver.com/userfiles/file/15442950921.pdfIn PDF document text
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4e7f015b0---jubirujezopazupemozozewij.pdfIn PDF document text
    • http://miroslaws.com/ckfinder/userfiles/files/puvuzatisawonuwoxuwibop.pdfIn PDF document text
    • http://mp-journal.com/media/file/fafom.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a90f84b787b---diwaf.pdfIn PDF document text
    • https://longhoang.vn/upload/files/kulazotifotoxipogapez.pdfIn PDF document text
    • https://nestsearch.in/admin/uploads/file/xuliwaligewixatexoxa.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/jekewug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=cost+estimating+manual+for+water+treatment+facilities+pdfPDF 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_off00010852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10852 11180 bytes
SHA-256: 20e555c0003388d39b5e0076220615f31423eee27a6c31d624c3e65c70a8348d
font_01_sfnt_off00012257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12257 16968 bytes
SHA-256: eef8aa46557844ecbc39f6bc80e1a4217fe9d13611b23089fafb9a27d0c22d97
font_02_sfnt_off00014e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1