Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e2952f9516b6f81…

MALICIOUS

PDF

75.4 KB Created: 2021-09-17 22:12:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ef1010ed3567302b26bf6202c8325ee8 SHA-1: 9d9e34ba42453ffd3418ea17292efb0a22378b1b SHA-256: 6e2952f9516b6f81f87426afb6b1a7cd49731eb382bb03536a7a9f03a1fdd853
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to suspicious PDF files hosted on various domains, suggesting a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' confirms this behavior, indicating a tactic to obscure the true destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://rtm-plus.com/ckfinder/userfiles/files/kefasiradigareberejovewew.pdf In PDF document text
    • http://baozhaopharma.com/upload/files/64939663895.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/18002861382.pdfIn PDF document text
    • http://aktasmatbaacilik.com/resimlerfiles/37411399532.pdfIn PDF document text
    • http://rosg.net/sa_upload/userfiles/file/20210901135304.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/161436e53440b6---90722746350.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210901114531_swuw4l.pdfIn PDF document text
    • https://olterus.info/contents/files/97099284089.pdfIn PDF document text
    • http://fuguchair.com/upfolder/e/files/20210913011402.pdfIn PDF document text
    • https://truckforceone.com/upload/editor/file/xutol.pdfIn PDF document text
    • https://digireg.gr/upload/subetofuguvebutof.pdfIn PDF document text
    • https://hurghadalife.net/userfiles/files/josuvomi.pdfIn PDF document text
    • http://yuemeism.com/uploadfiles/files/faveguxopuxet.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/munujado.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/a9a6566982393d268312cc4c51aa4334/90386650130.pdfIn PDF document text
    • https://horgaszvelem.hu/ckfinder/userfiles/files/72315112971.pdfIn PDF document text
    • http://balletpanov.com/uploads/files/paninusafonenejona.pdfIn PDF document text
    • https://siangyun.com/upfiles/editor/files/pezitewew.pdfIn PDF document text
    • https://isuzuphonoi.com/data/dulieu/files/32668396641.pdfIn PDF document text
    • http://jszl-rolls.com/filespath/files/20210912000302.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/95602720765.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/59721563854.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+store+json+data+in+sqlite+database+in+androidPDF 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_off0000c00f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC00F 17916 bytes
SHA-256: b221c42f3068f018e817598f757e70a2cee0f5c70180f4579d5ed1ffd5b7766c
font_01_sfnt_off0000eec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC9 10732 bytes
SHA-256: 3b855b3470cb0c6f2600ac9d6fd1f7dabdfe0a7669a331215ac276e6265fc56c
font_02_sfnt_off0001074c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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