Malicious PDF — malware analysis report

Static analysis result for SHA-256 978e9c5f8f0a0d68…

MALICIOUS

PDF

85.3 KB Created: 2021-07-09 22:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7bb35bf974f31d737a502e92c686eac5 SHA-1: 391b3463958755cd5a1360047013e0cbbf822c62 SHA-256: 978e9c5f8f0a0d680276d152cdf2281c230664bb33d28521c68f6ad1601192f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the presence of PDF link farms and the ML classifier's high confidence indicate a phishing or malware distribution attempt.

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 http://bukharageorgia.com/sites/default/files/file/xiwisopunuruneximawil.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/ll4omsugmtgjo0pije22vmcn14/66219093697.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9e8651592---vovofuzefetufifep.pdf
    • http://ceroki.com/image/files/kokimusabesofufoziwe.pdf
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/a0a3c065d075837081ab97ce1889dba1/31333239618.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/728ce5004020c594c37a27612698c867/labinetonogifuposejunij.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090f2553fa15---68619060212.pdf
    • http://caratow.eu/userfiles/file/kimafofusux.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2152dceba7---kovopali.pdf
    • http://parcfamilyreunion.com/clients/b/b3/b3ae52aef0329bb57e848b27182677c8/File/bewegelazegukuza.pdf
    • http://podwierzba.eu/ckfinder/userfiles/files/kuwiri.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/087980511c82b9481293c21253e4f9ea/vopupebuseto.pdf
    • http://dh-life.com/ckfinder/userfiles/files/72905485943.pdf
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/78521119695.pdf
    • http://aite-materials.com/upfiles/file/zumevudovoxemobuwegoloti.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/78a7d4cecc0274b68e40389f2668b135/retagisetowunosoku.pdf
    • http://phuquytravel.com/nguyenvanlinh/files/23354422589.pdf
    • https://asthasupermarket.com/userfiles/file/38052446191.pdf
    • https://chambres-hotes-aube-bleue.fr/userfiles/file/gotivopalexegepumobazu.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074108883894---sosenatifetitobowisonur.pdf
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/d6892fe281b8ebf5217ea3f014d2cdfd/midimifididegamex.pdf
    • http://menafundinfo.com/userfiles/file/gaxujalakimoga.pdf
    • http://yossy.biz/userfiles/file/goxutogekite.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=beck+anxiety+inventory+manual
    • 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_off0000ead8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD8 16792 bytes
font_01_sfnt_off000102ea.bin
6c34047a0605769a1de5ccb180a908e0541e303e8e7fd1ebc4000c693960da65
pdf-font-stream PDF embedded font (sfnt) at offset 0x102EA 16984 bytes
font_02_sfnt_off00012f68.bin
91bd9fb4cb77323592aad9187be4462f23f9b4f05a948fe561b405c061bcb3d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F68 10752 bytes