Malicious PDF — malware analysis report

Static analysis result for SHA-256 7df316e04a42890f…

MALICIOUS

PDF

94.5 KB Created: 2021-07-14 06:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 8009c9b8b36018b3047a48cb0d6cb371 SHA-1: 2f6b13beae7a4035488769e622ef14e8d8f377d2 SHA-256: 7df316e04a42890f5369060354068ec831ff51e8bfa8cfc9df16c1c8aa4c41fc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content. The document's structure indicates it functions as a link farm, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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 https://huntic.ru/uplcv?utm_term=simple+love+spells+that+work+overnight PDF link annotation
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/gmqj1ltkl5t7fhpbijt45dflq7/xatexoweza.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/6584192843.pdfIn PDF document text
    • https://ideylia.fr/uploads/file/84304407030.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/zilirosidona.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/u7d89mgicdigkf8us7ofgs46ri/76444651846.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f5b8d34b9---gumazadezegiriwomuxo.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2f1611fbc---gufurexul.pdfIn PDF document text
    • https://colegiumaniucarei.ro/ckfinder/userfiles/files/jafawowugozuburetizes.pdfIn PDF document text
    • https://ta-taiwan.com/app/webroot/userfiles/files/10689603562.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/lixefideraxebate.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/7492ac5fda94272589c7a26d60b2feeb/ropigizezufozajuguvovova.pdfIn PDF document text
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076571ec67b1---govikip.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b262c0d58ba---94072173600.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/ckfinder/userfiles/files/29981299803.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/4ce610f81299d3083a9d799666157d4b/68282030729.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/vedu97jd7m2acgs2is620v16p7/47858397647.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/jejozobudasixozitasujilal.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/52923575128.pdfIn PDF document text
    • https://elearning-chemistry.ro/userfiles/file/51531416124.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/345smtcs5rodirpbcu3gbao12f/84336327481.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/08142015816.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/xasoxe.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/gekisapewapaza.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/ha1lp276ghsbbmb7nu8gefrava/72697466105.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/c496f68f5f6cb6fa0940d80dbd1fcbed/wigonotes.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/cc3d7b3bce1506883eb7f437901adf5d/26338474117.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_off00010db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB9 11016 bytes
SHA-256: 264cfd860bc05544ac64a5248d9b492dfe1093180b64c53285a6e5f6c5395bd7
font_01_sfnt_off0001272c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1272C 17632 bytes
SHA-256: 724f89921aadf4a00809a370f35d3b432c5e569afd0f709f8ee6b4596e069cf0
font_02_sfnt_off00015433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15433 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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