Malicious PDF — malware analysis report

Static analysis result for SHA-256 a22ce06f80dbc2c7…

MALICIOUS

PDF

80.7 KB Created: 2021-09-19 07:23:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7b7183e8258954e6df092a993474a905 SHA-1: 618db54f9c38e56b4c6c9f8c7d7d3e1609d6c083 SHA-256: a22ce06f80dbc2c771be303645258cacb4188c75c795383cd0bccbf57310752f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to various domains, many of which are flagged as link farms on disposable or potentially compromised hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution through these links. The PDF structure and embedded links suggest it's designed to lure users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/o7omh5bb7vukn6k9f0tb1mpq54/zoteripizigixo.pdf In PDF document text
    • https://galerieportelouise.be/userfiles/files/rizujizeletumi.pdfIn PDF document text
    • http://physio-praxismitte.de/userfiles/wunajeb.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/161305a2d808ff---60736071758.pdfIn PDF document text
    • https://simpangkanan.com/contents/files/40352999783.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/80925744541.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc9893b6b1---noxuvigevuwi.pdfIn PDF document text
    • https://atiksigorta.com/files/70916850845.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/770dcff55dae3d7587b3bfc0e218b2c8/rixedepuxesanotezav.pdfIn PDF document text
    • http://koala-al.com/d/files/26984734390.pdfIn PDF document text
    • https://iuoshili.com/upload/users/files/46135732748.pdfIn PDF document text
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/2693868116.pdfIn PDF document text
    • http://www.accl-calibration.com/login/ckfinder/userfiles/files/jaleposetufusejalugesaj.pdfIn PDF document text
    • https://wtmasonry.com/ckfinder/userfiles/files/4395039175.pdfIn PDF document text
    • http://megamento.com/_UploadFile/Images/file/wojutobibabezorobomiluli.pdfIn PDF document text
    • http://chinalabware.es/d/files/19335713532.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/lumufetobejutowup.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/rusazupewedelurarixopanel.pdfIn PDF document text
    • https://maxflowfans.com/userfiles/file/93545273467.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/97145979904.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=ultimate+stick+fight+apkPDF 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_off0000d445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD445 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC57 18764 bytes
SHA-256: 022cb0696c062d279e4d3e776376810d56ccf998641dc4bfd407e337064d5010
font_02_sfnt_off00011ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE6 10704 bytes
SHA-256: cc17f40edbe5a511029d973c4d61e1133fdd844e670dbeb60aedd030072d36b7