Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec7bc10aff222854…

MALICIOUS

PDF

89.5 KB Created: 2021-06-27 21:50:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 97da9581eb8b99eecbd6c9a96de28292 SHA-1: 02e58e6b7405e08709dc0e0f1dc163aa37941b12 SHA-256: ec7bc10aff222854f78391d47f3721a6fd147076e740d025834d8210b260a982
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories. These links likely serve as lures for phishing attacks or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/af2be696c1e1899393d55d2a5995cc38/kekumu.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/nkaiqfothaglat82qhh4e1eudh/tijofirobetirij.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/ed1f59285830a7555dd5cbb3cebb0684/bewozizi.pdf
    • http://nhs-carpediem.com/clients/46367/File/petodovonuvinibafo.pdf
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/af0f6f38d741239c7265608c4acd4625/fizavenidebetetefa.pdf
    • http://sevimticaret.net/userfiles/file/wugabaxusazup.pdf
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/enljvvajgtava9p2a15dbeth62/38218715196.pdf
    • https://zivotzaokny.eu/res/file/roxinasukizorofalosileled.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/770c004d87d4911a2b1019fe5360b8da/16538426772.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085aef72ba63---96852147232.pdf
    • http://icltindia.in/userfiles/file/42687952315.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160cfd0118ee6d---34984338036.pdf
    • http://alwaditrading.com/userfiles/files/72078089425.pdf
    • http://zrdb-drogbud.pl/Upload/file/10113082601.pdf
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/1b8afb56536bd4ecaf43fa52963c3656/75849875117.pdf
    • http://cariboohose.com/userfiles/file/76028926264.pdf
    • http://beulahcooleycollection.com/clients/870349/File/giremowoxesotovi.pdf
    • https://cristalensi.com/public/File/74584090733.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b58734754e9---15681858825.pdf
    • http://capmar.eu/userfiles/file/300755352.pdf
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/268ef2faa07c00563d4875ea7444c8e4/49891799857.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16082440f6b28e---97111422058.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=yoranian+puppies+for+sale
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbea.bin
29ebd4f5de3ed7a0aa9c1107fbdcdda70ce008ffb12a2f6ee9255a25b52fe2bc
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEA 17436 bytes
font_01_sfnt_off00012969.bin
38f8955c7942a648a86de44ea6f4564bbf49b27190eab588a05afae666ebe66d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12969 10336 bytes
font_02_sfnt_off000140ce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x140CE 16792 bytes