Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d2d1c7af25ac52…

MALICIOUS

PDF

79.0 KB Created: 2021-09-03 16:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e839c8c2aef8767c26b267685c598b18 SHA-1: 054467ef0887868173c8751d1edce51146b5e5d7 SHA-256: 97d2d1c7af25ac524329f6953b12ea0c0a8a7738309301e7f0919ebe43e66315
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phish users. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly indicates a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://ketchas.ru/uplcv?utm_term=bodysurfing+ukulele+tab+pdf PDF link annotation
    • http://aarogyamedico.com/userfiles/file/759748837.pdfIn PDF document text
    • https://edmaker.site/wp-content/plugins/super-forms/uploads/php/files/421bb9fa0f7e521f31abb4353aa0dc8d/69294281462.pdfIn PDF document text
    • http://xn--aknmedcal-wpbe.com/uploads/file/35066462972.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/85c8f2e1ed0dfef0a512640360cb4590/konelo.pdfIn PDF document text
    • http://multi-accueil.fr/ressource/site-image/files/gigimaga.pdfIn PDF document text
    • http://bresky.cz/res/file/zabogu.pdfIn PDF document text
    • http://zdravi-kromeriz.cz/files/file/ruxutina.pdfIn PDF document text
    • https://swiz.eu/files/editor/xonefuleguxirup.pdfIn PDF document text
    • http://cdhsalumni.com/clients/28864/File/bewarafem.pdfIn PDF document text
    • http://gptools.net/userfiles/file/24313855471.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/zafuzezigu.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608d514d42656---40552857342.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/1732e6317f2a6b5a5f8238b5ef44905d/fodanusopafu.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/bubodik.pdfIn PDF document text
    • http://jan-fotografie.nl/upload/files/gedajosozojudimotetado.pdfIn PDF document text
    • http://marmaraisg.com/images_upload/files/kabewidabatu.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1609485f7797e1---razutitulaxuwabe.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/5a519a68735409fb74e884d477046564/35348864977.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/bakojodu.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/1702612e4cfd19a6da03921f7bac028d/dupanof.pdfIn PDF document text
    • https://pacpartner.net/images_client//imagesfile/fazazelatixakiginuwuzifut.pdfIn PDF document text
    • http://stevis.cz/files/file/56261014009.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8e5934ae3d---mibipitanepifigokawanad.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bd96ecd67ea---37435257363.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/6df040f0f2ac12dc784ab5886a8e5f11/18446419669.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE538 17820 bytes
SHA-256: 943c0544b3d162152dc0214e15da4d548f8ed5b5073b1c1243850f978e0cbfea
font_02_sfnt_off00011437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11437 11172 bytes
SHA-256: 929d635304edcbfb5928258db2d4aad4d80eaf263d7e65447ea16d511865cf17

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