Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32949f3f4ad4695…

MALICIOUS

PDF

69.7 KB Created: 2021-09-13 17:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7e21f2e5c4bd571d119356c855a3c978 SHA-1: 34384e4ea8152d9e222212434bad115e94ebe013 SHA-256: b32949f3f4ad4695622d4d9a2391be9276c6184c8fda40d0b1030c218af0dfe1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with many pointing to disposable domains and exhibiting link farm characteristics. Heuristics indicate this is a phishing or malware distribution attempt, with ML and ClamAV classifiers strongly flagging it as malicious. The primary function appears to be redirecting users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://wannawwannie.pl/userfiles/file/43620826519.pdf In PDF document text
    • http://szguilong.com/userfiles/files/1400406023.pdfIn PDF document text
    • http://dorinhawear.com/admin/fckeditor/editor/filemanager/connectors/php/fckeditor/editor/filemanager/connectors/php/userfiles/file/46956779780.pdfIn PDF document text
    • http://flairpens.ru/uploads/files/tulivusejapelelekuveded.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/208773c021e2652d546151ec53fb6cc7/donoloxe.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/51214132448.pdfIn PDF document text
    • http://tc-antey.ru/uploads/files/71700512593.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/19603469406.pdfIn PDF document text
    • http://gazdalkodjokosan.hu/img/userfiles/file/gopuzojuposisejivoxisu.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/64958712054.pdfIn PDF document text
    • http://ciccioinpentola.com/userfiles/files/buzesatogikijirul.pdfIn PDF document text
    • http://medica-brno.com/files/butoxu.pdfIn PDF document text
    • https://paroles-vives.com/ckfinder/userfiles/files/44582656551.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/zufexineradepewed.pdfIn PDF document text
    • http://j-club.eu/userfiles/file/7444515504.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/37712389737.pdfIn PDF document text
    • http://scsychem.com/upload/files/rodezasepapekizus.pdfIn PDF document text
    • http://noticiascgnews.com.br/ckfinder/userfiles/files/juromobubaborodu.pdfIn PDF document text
    • https://kaplaitalia.it/userfiles/files/94449156392.pdfIn PDF document text
    • http://studiolauramoschini.it/userfiles/files/zevudolofilorir.pdfIn PDF document text
    • http://nanoservice.cz/upload/file/31438807486.pdfIn PDF document text
    • https://hgqq.hk/tony/churchofgod/ckfinder/userfiles/files/55036216881.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-9-12/20210912015744279718.pdfIn PDF document text
    • http://apcmagon.com/userfiles/ripukoxetuwogufus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=my+hero+ios+gamePDF 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_off0000b392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB392 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA9 10412 bytes
SHA-256: 231dbbfb5cc4836d0835a65922bfae279d7a214d050947c5fa7518e4f2d031d4
font_02_sfnt_off0000e34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34F 15264 bytes
SHA-256: 9f88fe57c233026b6a0b1b34cde49f04efd2fa07931c346a7ee103f843e1f59a

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