Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce41eb188e6ccce…

MALICIOUS

PDF

87.9 KB Created: 2021-09-10 04:08:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5acd0a177f89f4849fcd449853708d56 SHA-1: 95c4473b248e428a29c067afb1ac96b41d5b4807 SHA-256: 7ce41eb188e6ccce03d1d1c753e7e4372e84da8e8c1c5a5af5ac967b4b9fe6e5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and contains numerous embedded URLs pointing to external sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates these URLs are part of a link farm on disposable hosting, suggesting a phishing or spam campaign. No scripts were extracted, but the presence of many external links implies an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://smidgel.ru/uplcv?utm_term=best+smartphone+under+5000+in+bangladesh PDF link annotation
    • http://geostudio.eu/userfiles/files/43712891227.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/47816558203.pdfIn PDF document text
    • https://delphin-bau.com/ckfinder/upload/files/90108210113.pdfIn PDF document text
    • https://hitourkorea.com/FileData/ckfinder/files/20210901_7D09A9E3B748931E.pdfIn PDF document text
    • https://eric-parnes.shortex.com/ckfinder/userfiles/files/57975624887.pdfIn PDF document text
    • http://studiochiodo.eu/userfiles/files/52432997099.pdfIn PDF document text
    • https://newegys.egyseg.eu/ckfinder/userfiles/files/33184910413.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/cd1ecdf9c2d592ce3d33c289157da5d0/19549483370.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/44298404671.pdfIn PDF document text
    • http://4bx.pl/public/file/51596209650.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/pukogurozapikevebow.pdfIn PDF document text
    • http://eszixv.hu/ckfinder/userfiles/files/lisizowo.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/e37aa9eefa2fe96efeec4fe2583d4213/wejijoxadeg.pdfIn PDF document text
    • https://simbhaolipower.com/images/file/jilatewugesimisaxemim.pdfIn PDF document text
    • http://szjwwj.com/userfiles/file///xejinutigizefisazor.pdfIn PDF document text
    • http://ebbers-schilderwerken.nl/uploads/files/masopubagagumesoralagu.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/josanovukasinorokunagevi.pdfIn PDF document text
    • http://studiolorenzino.eu/userfiles/files/91770311063.pdfIn PDF document text
    • https://ispartaprefabrik.com/ckfinder/upload/files/runav.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/18944150165.pdfIn PDF document text
    • http://yuhao-tech.com/userfiles/file/93819775799.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_off0000f136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF136 17972 bytes
SHA-256: 256d2174181cb10d27bce8c3e68d6adee261bb1b39192ced2b4014b4a9bb9999
font_01_sfnt_off00011fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBB 11388 bytes
SHA-256: 53fbd8eda88eb44d5fef597a83c0d7131a25a7e65211b00ec3d5ff9204a1225b
font_02_sfnt_off000139f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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