Malicious PDF — malware analysis report

Static analysis result for SHA-256 98e9a052189c0a62…

MALICIOUS

PDF

81.0 KB Created: 2021-09-23 23:12:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0ed1e9fd602d48e7f60e4bc2700048db SHA-1: 259754956654d8b5a3011ea82874fff8cc130829 SHA-256: 98e9a052189c0a620f37a4004e2e280af092a9277d02715635953e05b2ea964a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's used to redirect users to potentially harmful websites. The presence of embedded URLs further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://wastran.ru/uplcv?utm_term=policenauts+ps1+iso PDF link annotation
    • https://flomogroup.com/upload/files/jajezofefo.pdfIn PDF document text
    • https://www.verimevzabavu.cz/ckfinder/userfiles/files/3805377878.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/rapenovidejil.pdfIn PDF document text
    • http://liga-stf.ru/i/upload/files/80015779.pdfIn PDF document text
    • http://8njl.com/userfiles/files/73996909491.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/5317594505.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/36389526798.pdfIn PDF document text
    • http://basse-normandie.annuaire-regional.com/ckfinder/userfiles/files/penanojinovu.pdfIn PDF document text
    • https://cvsc.co/userfiles/file/58055715549.pdfIn PDF document text
    • https://fallsplat.se/bildbank/file/12226856865.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/ripodilibigewas.pdfIn PDF document text
    • http://wingtsunkungfu.ro/imagini_ws/mujinanetivelutenupage.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16137604e57469---xujiwop.pdfIn PDF document text
    • https://htijsr.com/userfiles/file/genuwigiganinofubos.pdfIn PDF document text
    • http://hanlacsclub.com/ckupload/files/moxuvutusamixu.pdfIn PDF document text
    • http://unsersohn.ch/images/file/vaporelezi.pdfIn PDF document text
    • https://nbcmedia.vn/ckfinder/userfiles/files/rusisujef.pdfIn PDF document text
    • http://chapelguild.com/images/usr/10291391386.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/ivtv4aee0irr0b9gk89j5tk19u/27792702830.pdfIn PDF document text
    • https://yoimart.com/upload/file/20210921165419.pdfIn PDF document text
    • https://actionsporting.com/userfiles/files/66289642286.pdfIn PDF document text
    • https://www.hotel-restaurant-plainfaing.fr/ckfinder/userfiles/files/47781869046.pdfIn PDF document text
    • http://iranjobex.com/cache/fck_files/file/91072514883.pdfIn PDF document text
    • http://www.rsvpcatering-ar.com/files/imagesfile/banefevosazujawutasajenor.pdfIn PDF document text
    • http://xn--oy2b19v1mb1yi.com/userfiles/file/29899431396.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/66255167088.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_off0000d4c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C8 10420 bytes
SHA-256: 186093f4cbf2b78d3320806588678b731f9861ad3afc8d8645f02ff8a0cafcc7
font_01_sfnt_off0000ec8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000104a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A1 19044 bytes
SHA-256: 266cc4b86a611c2350a967c6d349b6e09424fbc562470f314dd65cf2ab8e42ca

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