Malicious PDF — malware analysis report

Static analysis result for SHA-256 981d0d7842a52dcd…

MALICIOUS

PDF

73.4 KB Created: 2021-09-09 12:58:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 601cc2cff23e3f89f25dceaef9d90766 SHA-1: dee00928be1a464b63f51bbb6cf14672f7ef3cd1 SHA-256: 981d0d7842a52dcd4dea7edef6a191fbdd0e4634845761275426f019ffe3b65c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports that the document is designed to distribute links to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://laborke.ru/uplcv?utm_term=chup+chup+ke+full+movie PDF link annotation
    • http://enricobarraco.com/files/xifuweko.pdfIn PDF document text
    • http://wohingltd.com/userfiles/33499550517.pdfIn PDF document text
    • http://detaycopymatbaa.com/userfiles/file/fabijed.pdfIn PDF document text
    • http://apple888.vn/luutru/files/44657446901.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136c4e97421b---60383344384.pdfIn PDF document text
    • http://brickform.cz/obrazky/files/wafijeginokasexoraj.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/73148384220.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/92261743021.pdfIn PDF document text
    • https://unitedpetexpress.unitedreloth.com/ckfinder/userfiles/files/wuletowijo.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/pixutipuxupezumazalewu.pdfIn PDF document text
    • http://stonestudio.pl/files/upload/file/98070468986.pdfIn PDF document text
    • http://ls12368.com/userfiles/file/nanevikuxuwukapi.pdfIn PDF document text
    • http://ohxto.com/uploaded_files/userfiles/files/18517888602.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/53785689396e38102bca2dd7d40d995f/56226748292.pdfIn PDF document text
    • https://kimcert.org/E/file/penitosu.pdfIn PDF document text
    • https://playindiano1.in/ckfinder/userfiles/files/siwofop.pdfIn PDF document text
    • http://saluteebenesseresas.it/userfiles/files/pezavesodizofi.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/zovuj.pdfIn PDF document text
    • http://giasuminhtam.com/Images_upload/files/79571517969.pdfIn PDF document text
    • http://lifeline-sports.com/files/file/kijoveviribobuxezigepuju.pdfIn PDF document text
    • http://thegioimaychaybo.com/app/webroot/uploads/files/kidalurogaxifoko.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_off0000bbc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC2 10400 bytes
SHA-256: 0591c7fc57ab957c11997fd49a1dbde9d8408deffd107a1fbc29a12675b81c36
font_01_sfnt_off0000d354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD354 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eb66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB66 17488 bytes
SHA-256: be87bdc976039eb7d89ab99e773567eb522a1682fd45ffce0908f62dc1b8b02c

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