Malicious PDF — malware analysis report

Static analysis result for SHA-256 98352e5fecf33e9d…

MALICIOUS

PDF

83.2 KB Created: 2021-06-28 13:14:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 064c5063cca5aaf0fd10d471a0457083 SHA-1: 1753652de4539191ceefadc462c0050565036633 SHA-256: 98352e5fecf33e9d8c30bdc1a629cc02d25c859b769a8ae5840f4c553721a47d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other domains, likely intended to redirect users to phishing pages or download further malware. The presence of external URIs and link farm characteristics strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://infrive.ru/uplcv?utm_term=boating+accident+lawsuit+helios+legal+group
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/36f609ee53fe45f0f522c8d281a906f5/93629353508.pdf
    • http://kidneytracker.com/ckfinder/userfiles/files/gozaj.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa47d07fb6---81186728321.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/31v6qcmkrpa8th3q00qtburoq5/javidilajizozi.pdf
    • http://ligonfamilyreunion.org/clients/9/9a/9a44987365eba454cd9b2deda39aa7c0/File/65362259005.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0be593e2d---bonaromonolazojoluti.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/7l4aev5ks1862s010snksepk53/lezawazanazepolo.pdf
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/kipkcbb2m3u35rip44tlkgp4qg/29221416715.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/5c673bd89a478c8a4fb44bf79d32ee98/63284801084.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/bdc87b5103c5283ffde02186c58a3b86/72958476226.pdf
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/cd49bf964f7594af45d57fc006c60c7f/zimexekowenetefagow.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/9v9pv74auhgd1ps2hl4gubnf6o/dezavu.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f483b20bdd---19756476046.pdf
    • https://banderlogclub.ru/Files/file/jetaseso.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a963162f346---pemomigegijokip.pdf
    • http://kamnitikamini.si/upload/files/40692556718.pdf
    • https://abicecream.ru/ckfinder/userfiles/files/16387445659.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/e878b2add200fbfa5ec8978a4720dcf8/gexopobowupax.pdf
    • http://paulsaperstein.com/userfiles/files/75323272632.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607985380cbf2---kirizunudemoremedasan.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c3326c3370b---sixinede.pdf
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nuxeguzabedulunaku.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ad81e251603---2313491926.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/f46514aa6d83cb6e6d0226877ebfe9e6/duzibapufonirivomam.pdf
    • http://hongdacable.com/d/files/34521291749.pdf
    • 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_off0000e047.bin
b290d02440a5ca2a88a5249ee6cc69906e9c13c49452074fc475f79ae815c1c6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE047 16680 bytes
font_01_sfnt_off00010bdd.bin
c9f53dc6792bf5e9be8cbc70ce07b6582140f42fc98c28fc999b34a4eb8c6bca
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDD 11032 bytes
font_02_sfnt_off00012567.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12567 16792 bytes