Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e85bbe1e404ff0…

MALICIOUS

PDF

82.2 KB Created: 2021-09-13 13:07:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ce4b7866a415b8bbde2d9e7c1cc89bba SHA-1: 0760d4444e0a927327f2406888c23609aba61f5b SHA-256: 69e85bbe1e404ff0fced5491275a170be535e4615f84bc5310c48d63acb2b394
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains numerous external URIs and link farms pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The PDF structure and embedded content indicate it's designed to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://queure.ru/uplcv?utm_term=move+stuff+to+sd+card+android PDF link annotation
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/20a32f4f38933cb59e420787055afef6/rutirirevumokorevi.pdfIn PDF document text
    • http://hungthanhauto.com/luutru/files/tigobipaniletuzenifiv.pdfIn PDF document text
    • http://pinxedien.net/upload/files/92975219545.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/bb7e1ab4b246acc0a4b21aaea7baeebd/33277879894.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/63d5ef1f6d0cd853997700addc0221dd/bisumu.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/97961262946.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161306dc54e39f---33387927810.pdfIn PDF document text
    • http://seibyou-koujien.com/files/files/welewujejibukitupugon.pdfIn PDF document text
    • http://xn--80aamwn.xn--p1ai/userfiles/file/9186584823.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/kudunulomelosogowipekiwo.pdfIn PDF document text
    • https://nk-sostanj.si/files/file/71809320495.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kimuxuwutotudekizafi.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613afc16ef20f---kepuwosejizaz.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210904171304.pdfIn PDF document text
    • https://xistenze.nagydavid.com/files/files/gokijadovid.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/burirakexeveboju.pdfIn PDF document text
    • http://antropolog.ru/userfiles/file/38256514769.pdfIn PDF document text
    • http://hotelbasantresidency.com/uploads/xajinirom.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16135a22ede5ea---zoben.pdfIn PDF document text
    • http://gordostcrista.ru/userfiles/file/xelusujutogizuz.pdfIn PDF document text
    • http://onlinetalk.jp/app/webroot/img/fckfiles/file/vewodavurarojejosenurum.pdfIn PDF document text
    • http://ashioke.com/images/library/File/wemibabovademavopuwegid.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613d02acbf64f---neziguxukavazajemananisap.pdfIn PDF document text
    • http://alacartedesign.de/userfiles/file/17156808010.pdfIn PDF document text
    • http://metall-press.ru/files/36368747082.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_off0000def1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF1 10584 bytes
SHA-256: 94de2aeed51e51d2cc15ae3c80d30e5edafc537fe5a991c853e14c08df2bdee0
font_01_sfnt_off0000f74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74C 17020 bytes
SHA-256: 288e7205388aba10e9725abec43dd7bf03367704e22d869ad8edfe8d7d85eb78
font_02_sfnt_off0001238a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1238A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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