Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec29d54939d06678…

MALICIOUS

PDF

83.1 KB Created: 2021-09-21 22:29:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 589b91e7fa557d48d2817e9c99262a80 SHA-1: 40fe3d2ac41956dfd2b841a93f16b5d658e07348 SHA-256: ec29d54939d0667897d608ace55ee44e804d4c126bc89ddb55b8182ffc85b83c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which are part of link farms on disposable hosting, suggesting a phishing or spamming campaign. The PDF's structure and embedded links indicate an attempt to lure users to external sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://queure.ru/uplcv?utm_term=hip+flexor+diagram PDF link annotation
    • https://jecoexports.com/ckfinder/userfiles/files/9688652807.pdfIn PDF document text
    • http://recko.ru/ckfinder/userfiles/files/45485782078.pdfIn PDF document text
    • https://onlinendttraining.net/files/80566606215.pdfIn PDF document text
    • http://paulgraphics.paulsfashion.in/files/22490009265.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/26930155833.pdfIn PDF document text
    • http://vanguardhungary.hu/userfiles/file/wizexunowerugidofet.pdfIn PDF document text
    • http://aokisuper.com/ckfinder/userfiles/files/lolatatuzuwejefojivil.pdfIn PDF document text
    • https://alkoplast.rs/files/31356007423.pdfIn PDF document text
    • http://vietsinphar.com/uploads/files/fatupinuf.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/50845397528.pdfIn PDF document text
    • https://webmakler.org/userfiles/file/sorurixumimoweriwi.pdfIn PDF document text
    • https://xn--80apefbdm9ah5g.xn--p1ai/userfiles/99983591592.pdfIn PDF document text
    • http://yibetter.com/data/files/busopuledobifixa.pdfIn PDF document text
    • http://shopcode.ru/uploads/file/7191916087.pdfIn PDF document text
    • https://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/48653548459.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614531327088c---kawoje.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/wilorizajoxelo.pdfIn PDF document text
    • https://combrooncom.com/contents/files/sosirubisakokevepej.pdfIn PDF document text
    • https://nevjegyzek.eu/uploads/file/50624356288.pdfIn PDF document text
    • https://novsport.com/content/File/84264185911.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/73942699863.pdfIn PDF document text
    • https://designclarf.it/file/tobenunimiwonerapepe.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///48249613900.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/31532315560.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/pelogajefebufoboxe.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_off0000e2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB7 10564 bytes
SHA-256: b7b89c620b9239c2aa6c70ff4108437408ad011cd2163e60534e69f39924ca3a
font_02_sfnt_off00011285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11285 17304 bytes
SHA-256: ed62a6b0fd165ac5ccec0340cca9fb4e968aafc20708296ab4c9e8059fa81496

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