Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9593fc7bd3d0ca7…

MALICIOUS

PDF

82.1 KB Created: 2021-09-13 09:01:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 917c78815fac45f0e3106d1f638424d2 SHA-1: 4bdac4201919265fd34f35af530f96e4098d043c SHA-256: a9593fc7bd3d0ca7273630c2f8bc9a3a12cbcb1eeea1153231d078fea1f6bd92
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains embedded JavaScript and a large number of external URIs, many of which are linked to disposable hosting, suggesting a phishing or malware distribution campaign. The PRC/3D content heuristic also indicates a potential exploit vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • PRC/3D content in PDF high CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://krisoc.ru/uplcv?utm_term=vomit+comet+tickets PDF link annotation
    • https://pediatricpotentialsnj.com/PP/PPpng/files/88447662397.pdfIn PDF document text
    • http://ainut.fi/userfiles/file/xowisofokerufuno.pdfIn PDF document text
    • http://ahjygjg.com/upload_fck/file/2021-9-8/20210908114914620442.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/82545006740.pdfIn PDF document text
    • https://mami-m.com/Uploads/userfiles/files/31155499262.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/zusadesurekagibejog.pdfIn PDF document text
    • https://mi-stores.com/basketballtotaal/images/editor/file/lerabaxagefanotomadina.pdfIn PDF document text
    • https://dukeofmarshall.com/ckfinder/userfiles/files/57585680813.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/f1f867574304526af62a063bc128cf3b/jizadan.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/genewatafalu.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e45fe672d5---80727268893.pdfIn PDF document text
    • http://mabo-meccanica.eu/userfiles/files/ziburepagubisefun.pdfIn PDF document text
    • https://koratspring.com/upload/file/32050506454.pdfIn PDF document text
    • http://red-persimmons.com/upfiles/editor/files/85447757479.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/30030964823.pdfIn PDF document text
    • http://pjzhengwang.com/upload/file/20210912_194616_121.pdfIn PDF document text
    • http://dc-3ed4d7413bdb.prshots.de/uploads/userfiles/1630897743/files/26349689298.pdfIn PDF document text
    • http://tysons-cafe.com/uploads/files/30416446454.pdfIn PDF document text
    • http://banlinhkienlaptop.com/userfiles/file/mevipevemotepol.pdfIn PDF document text
    • https://hunghiephuylog.com/upload/files/mivaboroxoketadelukizudu.pdfIn PDF document text
    • http://huefpdf.org/upload/file/kifekaxovojuxajupiv.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_off0000dbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEB 18424 bytes
SHA-256: e5c148008931f27786813eab97e8cadd94cc2249d242682f711d5132be7fde97
font_01_sfnt_off00010c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001247a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247A 10040 bytes
SHA-256: 3597875fb775b174f484a8ea2fc7f794ea91683e1ecc2d23e482ba2785e2861d

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