Malicious PDF — malware analysis report

Static analysis result for SHA-256 68f8811216d4c22b…

MALICIOUS

PDF

85.2 KB Created: 2021-08-09 15:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8b1a85900a2af6b4ccb82d7cfc6612bf SHA-1: 332f6e42044137e9e70546866c161c7282892612 SHA-256: 68f8811216d4c22b0682d4dc63a15c76e812ff8c4933697f4a7015b68ee1a4b5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress upload directories and disposable hosting. The presence of these links suggests an attempt to lure users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://irlanc.ru/uplcv?utm_term=how+to+download+happy+wheels+in+mobile PDF link annotation
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d1e87ad06---pobupagaziwur.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160dc68157ec6b---53190936033.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/25389709621.pdfIn PDF document text
    • http://101balkon.ru/upload/files/wilirapajujalorimape.pdfIn PDF document text
    • http://dailythang.com/userfiles/files/45547874374.pdfIn PDF document text
    • http://deltools.com/userfiles/file/sevemejuweturuzagukif.pdfIn PDF document text
    • https://supermagnum-bg.com/ckfinder/userfiles/files/96794997554.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/21686217277.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/loglj3es89u314oigrnv0eosie/kivajabiwebowinake.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/wolireligewebujilezojat.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/2368830443.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b8250a72e3---63300700020.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/0f56e9eec350eea382ab2369c4a8cebe/repijetilewafegogitek.pdfIn PDF document text
    • http://carolstoecker.com/clients/c/c6/c60e280709801842a26e47e23f21f170/File/94387878940.pdfIn PDF document text
    • https://aonetreks.com/uploads/file/gogukovadup.pdfIn PDF document text
    • http://ventmetal.ru/userfiles/files/fotutoziwubasuselemedebev.pdfIn PDF document text
    • http://maybomchuachay24h.com/Images_upload/files/53098073976.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b29fe552dcf---raxaneruwawagagivute.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/efb274ed350d84786ab93649f582ebad/dufaluzuvawosazemafixobap.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d487d2bfdb---zenefixog.pdfIn PDF document text
    • http://smwiarus.pl/ckfinder/userfiles/files/66624331261.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/3780547851.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/39178725301.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/oumlkcjerpk92eg536jk9us6cd/72116304056.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_off0000eba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BA 10888 bytes
SHA-256: 89f0c74198eb445d3136359e2088826dcde43e02b1c52a7d52db1a53b2dd7c43
font_02_sfnt_off00011c7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7F 16564 bytes
SHA-256: 502cad4194f812b91827c0809abf39f8363855919f9f65498045f14be9a26583

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