Malicious PDF — malware analysis report

Static analysis result for SHA-256 10f87eafb89e37e2…

MALICIOUS

PDF

74.0 KB Created: 2021-09-04 20:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f33875ed8328d3672af2b754a2e9826d SHA-1: 672f7283c427d0017085e9b0594bfc4a91e4800b SHA-256: 10f87eafb89e37e27f0c0b2032dfb88dafa4514e3d08b99fe1142228471b62e3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous URLs, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded URLs indicate an attempt to disguise malicious activity as a legitimate document, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://garglob.ru/uplcv?utm_term=determinar+tama%C3%B1o+de+muestra+pdf PDF link annotation
    • http://deauville.ru/files/file/57766500846.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d42608f98c---xopisaponiruroper.pdfIn PDF document text
    • http://teormech.ru/teormech/usrimg/file/26856349215.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/ec2550899625d8bfcc281b822b7d67a1/naratalovebafixu.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/113be8a93e53c978e408246aabce48e2/jafedififowemowi.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/8c49281933e276890a1b5c9a13fde7a6/98532689931.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a956768b935---59951662733.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/36510962243.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2863b63d0---55101487084.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609801bd0a98f---zawuxedexogegezenagega.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/f23c36b696547611bb4f9ff61a1836ab/25314130032.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/c5kbu6hff0h204s8j5d60gnjug/70876644643.pdfIn PDF document text
    • https://smithsgame.com/calisma2/files/uploads/kelilonudefinalavaz.pdfIn PDF document text
    • http://trungtinjsc.vn/upload/FCK/file/xuxonagoju.pdfIn PDF document text
    • http://lagrupacio.cat/file/jevipejudoju.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160acfad3bb172---12320253083.pdfIn PDF document text
    • http://pcwenhua.com/uploadimg/file/16257178861411579855.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/41796239136.pdfIn PDF document text
    • http://paradisetnl.com/FileData/ckfinder/files/20210720_5E5E2EFF6A6D186F.pdfIn PDF document text
    • https://kueapem.com/contents//files/70080231052.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/86330561dfaac2b2c4678591002dffab/83148347639.pdfIn PDF document text
    • http://thekitchendesignstudio.org/uploads/files/kugusujabulovi.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/37720610645.pdfIn PDF document text
    • http://cgmorenanews.com.br/ckfinder/userfiles/files/5371575290.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ada40f6cce0---nokasajipabolibopedudotu.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_off0000bd59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD59 16428 bytes
SHA-256: e4c96f596009d5a2f55d9d896ca7586a61ecdd76046293db239146292e34aa2a
font_01_sfnt_off0000e6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED5 10920 bytes
SHA-256: fde3b1245a3ec733661cd2d69c7ce1014d4b3aab14fcc3dc752dd673f0a42bec

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