Malicious PDF — malware analysis report

Static analysis result for SHA-256 0849b1c34f5024f9…

MALICIOUS

PDF

78.1 KB Created: 2021-09-21 19:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c3c0d50fb5c404a4b96fa810b68f34cc SHA-1: 83369a3ddba2325ce4ccf78c367ed50844d0a13a SHA-256: 0849b1c34f5024f905c093a081f868ae1a19155f75724933b1f84c9066b1a073
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with several pointing to compromised WordPress sites, indicating a potential phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious document delivery.

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://nomylo.ru/uplcv?utm_term=eclipse+for+android+development+on+windows+7 PDF link annotation
    • https://natanashoes.com/kingkong/userfiles/files/fumuzexe.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138a6129ae32---zusawekek.pdfIn PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/fijagawagufajilonevow.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/sonozexukefeligep.pdfIn PDF document text
    • http://www.tamtrebinhminh.com/public/files/remalunuwifiwad.pdfIn PDF document text
    • https://gadesign52.com/uploads/files/202109032119344858.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613396526413b---7283278313.pdfIn PDF document text
    • http://vnationwide.com/userfiles/files/481452038.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/40223925124.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/82c188ec44d7700848f94b71e1fad75e/kizotozoteferokumu.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/ad0cd1396d9d942524c537efcde00cba/regafobijegerapod.pdfIn PDF document text
    • http://ciskmv.com/css/file/95113622545.pdfIn PDF document text
    • http://logicparcel.net/uploadsEditorfile/sisikeguzumalizozitano.pdfIn PDF document text
    • http://isleford.com/filespath/files/20210909030735.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/161407e6a0733b---wulemu.pdfIn PDF document text
    • http://dreamsurgerycn.com/ckupload/files/vidikolulimirozolokixem.pdfIn PDF document text
    • https://galaxy-training.com/userfiles/file/vunijalusukotulin.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/gegifagavumorafokufokere.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/45669087632.pdfIn PDF document text
    • http://gzlmjx.com/data/home/bxu2343160066/htdocs/uploadfile/files/paxapuvegojowanetedis.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/tanujosirividawepazuvepiw.pdfIn PDF document text
    • http://aczelzalog.hu/tmp/94766596946.pdfIn PDF document text
    • http://bakefruit.com/uploads/files/202109130507146568.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/g3epk310ahn8pvo6s9ohkuv0bk/95289575019.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_off0000ca9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e2b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B4 10968 bytes
SHA-256: 6e59f55774787c5bd89a4475cc1788d1aa259ed547dfa3722251adcc91c75e10
font_02_sfnt_off0000fc37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC37 17728 bytes
SHA-256: 0de9278afcc45cab31c5ebc4b8b3f4478db616ce2b256449136c44b9180bdb4e

Open this report in the interactive analyzer, or submit your own file for analysis.