Malicious PDF — malware analysis report

Static analysis result for SHA-256 a32b3827a4dad000…

MALICIOUS

PDF

68.6 KB Created: 2021-09-30 18:14:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 27bfbae49a1cb38386e56cb0629457bb SHA-1: feb153a5a451f63457bfa2ad8f6d262de9f452f3 SHA-256: a32b3827a4dad0003d45df0d930740acb316b3c5a4495c0b57befcbb65daa9a1
126 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 a large number of embedded URLs pointing to various domains, suggesting a link farm or phishing lure. The PDF structure and embedded content indicate an attempt to redirect users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://oniceh.ru/uplcv?utm_term=360+video+app+android PDF link annotation
    • https://tierrettung-in-katalonien.org/ckfinder/userfiles/files/20639064628.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/66284854712.pdfIn PDF document text
    • https://ever-progress.dacola.com/upload/files/91900947486.pdfIn PDF document text
    • https://soportedevida.mx/ckfinder/userfiles/files/4116852384.pdfIn PDF document text
    • http://partnercable.com/files/zigopevazabagipoluzufeb.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/wusopulalazavobe.pdfIn PDF document text
    • https://nonbodepsg.com/uploads/files/rosikizu.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/71449636021.pdfIn PDF document text
    • http://luckysim.com/userfiles/file/44822087814.pdfIn PDF document text
    • http://turskazka.ru/ckfinder/userfiles/files/sukepivuxusesopafu.pdfIn PDF document text
    • http://abwvictory.com/uploads/files/17791687362.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/batijasavaw.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/fifududivumexovegu.pdfIn PDF document text
    • https://inprovitcentroamerica.com/ckfinder/userfiles/files/98384400161.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/wawezivux.pdfIn PDF document text
    • http://pfmconsulting.org/survey/userfiles/files/jikazaxugazusumito.pdfIn PDF document text
    • http://soupworld.de/upload/file/55936556191.pdfIn PDF document text
    • https://fond.ru/userfiles/file/vaxizijokik.pdfIn PDF document text
    • http://fine-trading-knotwork.com/uploads/media/64560725221.pdfIn PDF document text
    • http://paddockj.com/user_data/editor/ckfinder/core/connector/php/upload/files/38461952761.pdfIn PDF document text
    • https://unaizahic.com/Files/files/xoliramuwob.pdfIn PDF document text
    • http://worldprint.su/userfiles/file/fuvarikojunupelagiwipumas.pdfIn PDF document text
    • https://confeccionesruiz.cl/UserFiles/File/pafasexerepaseraxaxexaz.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/90151474642.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/nujezoxovegofuxakeruruda.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_off0000af8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF8A 15212 bytes
SHA-256: 92fe89bf671341c0cb5627d9ad2b7dbc22fa064053967e446ded5dfbfcc333b0
font_01_sfnt_off0000d527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD527 10504 bytes
SHA-256: a806680258c2a2ab0ab434d263a140483f891e8e1c5281ffa806ead7ff936f3b
font_02_sfnt_off0000ed1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1