Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7271243954af59…

MALICIOUS

PDF

73.0 KB Created: 2021-09-14 03:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3695a2f2471f0a4ec3499f9d0653a45f SHA-1: 193ea8fbe37fe0eb610595ef104d35c536121de7 SHA-256: db7271243954af59ff16fdb7579057907ea787114341e1cd62f4a2a94a90dbab
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host numerous links on disposable domains, likely to distribute malware or facilitate phishing. The presence of embedded URLs, including one pointing to a 'minecraft pe apk cracked' download, suggests a lure to trick users into downloading malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://t-cso.com/upload/file_folder/file/fononasaniraletilese.pdf In PDF document text
    • https://rjpexport.com/files/kowekerebagewike.pdfIn PDF document text
    • https://jancsoalapitvany.hu/ckfinder/userfiles/files/dupewodojevilarirewi.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/72799850145.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/53259034118.pdfIn PDF document text
    • https://equinox-e.com/upload/files/kozab.pdfIn PDF document text
    • http://phone-server.com/userfiles/file/bolefibovalesovututujuz.pdfIn PDF document text
    • http://klhl.com/userfiles/file/54088422818.pdfIn PDF document text
    • https://goldfieldssanddrags.com.au/ckfinder/userfiles/files/72912634436.pdfIn PDF document text
    • http://heydarbaba.org/resimler/files/kenaxowanolunosu.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161341f8964719---wulatabiregepiletupi.pdfIn PDF document text
    • http://thanhnienxp.com/vietkiendo/upload/file/pirufebijos.pdfIn PDF document text
    • http://ganteltechnology.com/system/userfiles/file/56816437678.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/11190821045.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/161343b21a4386---8479487314.pdfIn PDF document text
    • https://cpsguffanti.it/uploads/file/38684845770.pdfIn PDF document text
    • http://pxmonastery.org/CKEdit/upload/files/46148110111.pdfIn PDF document text
    • http://www.tm-africa.com/beta/public/uploads/cms_filescms_files/97249289117.pdfIn PDF document text
    • https://australiancaravancentre.com.au/application/third_party/ckfinder/userfiles/files/tegugileda.pdfIn PDF document text
    • https://perfecthospital.net/ckfinder/userfiles/files/timuwoxugoraxusagas.pdfIn PDF document text
    • http://hzqzg.com/d/files/34762553578.pdfIn PDF document text
    • https://xrtradingfeedback.com/cmsimages/file/zedidij.pdfIn PDF document text
    • https://gsacademy.ge/uploads/files/30883725382.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=minecraft+pe+apk+crackedPDF link annotation
    • 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_off0000bdb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDB1 10364 bytes
SHA-256: 484ebdac571c95236b8c08d5745a812c07273dd49db8054d94688d66060df007
font_01_sfnt_off0000d53c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4E 16176 bytes
SHA-256: 6b1661b0c91775f8c3e16c60c9f7399e92bb31f0e9965a081174b64851f11f78

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