Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2b0fe01f56b8531…

MALICIOUS

PDF

79.3 KB Created: 2021-09-18 15:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0b0959b40bf47d500ba3be7c31444012 SHA-1: a2959afbb89c87541c79d20a8d7e1fe949f639de SHA-256: b2b0fe01f56b8531b43174e63788c5b4285b3c42a64c4d2a9546ce98a8c201d3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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=canon+in+d+full+sheet+music PDF link annotation
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fa503d6db8---929605493.pdfIn PDF document text
    • http://refinerlink.com/userfiles/file/pazepejebejuvigusesupiduf.pdfIn PDF document text
    • http://torgoborud.org/images/file/tobuweribusutizogekime.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/16955043124.pdfIn PDF document text
    • http://basketaci.cz/UserFiles/File/fuzozavurasimajagevefiwol.pdfIn PDF document text
    • http://5lovestartw.com/CKEdit/upload/files/zinebis.pdfIn PDF document text
    • https://amoslodge10-org.alljobsinliberia.com/ckfinder/userfiles/files/87321634115.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/b429f728f99b659ad902d67ffdfbf45c/14999541211.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20210911015304.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/94631906837.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fa2ac15659---jogofafakilijezujefeja.pdfIn PDF document text
    • http://onyx-innovations.com/assets/ckfinder/userfiles/files/vadalejasetokirofum.pdfIn PDF document text
    • https://dispecom.com/cms_dispecom/sgi_userfiles/userfiles/files/97845212323.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/80997247811.pdfIn PDF document text
    • http://epicridesnepal.com/files/majujakovodidozakon.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/65797089092.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/62620966246.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/begawufuzanenizaji.pdfIn PDF document text
    • https://bokaichenyu.com/upload/files/55493502917.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/76058982849.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/161412cca42a33---rizavovejibigowozulej.pdfIn PDF document text
    • http://ducthanggroup.com/webroot/img/files/42026572908.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/c0deaa91fb3cb2c0fc4b35e7cf33317d/tanenadivuluduzelaw.pdfIn PDF document text
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/69240544352.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_off0000d32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32E 16884 bytes
SHA-256: aaa24fb84f6b4018d136df65376e250788651200f456f73734ad49bf31faae5f
font_01_sfnt_off0000fe7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11696 10772 bytes
SHA-256: 55afb749c0bffc02bb5e133a22d13d1b6711a890e9ba552186fa2be4ad570590

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