Malicious PDF — malware analysis report

Static analysis result for SHA-256 389bc92b84a97872…

MALICIOUS

PDF

68.6 KB Created: 2021-10-03 23:23:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a17cf4e049df42ebfbfbac545c1fd2f7 SHA-1: 0185bbe625d97d934b7d6053954da97d1403f7a6 SHA-256: 389bc92b84a978725520fe66c01f00b35ea9011999e533d9bad735e6f84d55da
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is a phishing or malware distribution lure. The embedded JavaScript likely facilitates the redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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://laplacedesstores.com/upload/file/18520186653.pdf In PDF document text
    • http://esipro.be/userfiles/file/10727116469.pdfIn PDF document text
    • http://aardbeienfeesten.nl/uploadimages/files/kodetewulezafiz.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/wukutifareg.pdfIn PDF document text
    • https://pmapmc.com/userfiles/image/files/83619587977.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/2021922181523151.pdfIn PDF document text
    • http://muabannhagiare.net/images/uploads/files/wojereduzigusuvajovigeji.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/u65e349rjtuaglgfcoang36oau/joresivibetazezana.pdfIn PDF document text
    • https://tadimtursu.com/image/files/gukozilizevelo.pdfIn PDF document text
    • https://kalafiber.com/webroot/js/ckfinder/userfiles/files/6787870757.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1614b0f8e03288---xafudipufajoj.pdfIn PDF document text
    • https://manorhair.com/uploads/files/202109031329557137.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/46114531045.pdfIn PDF document text
    • http://korsorlampang.net/user_img/files/1713893738.pdfIn PDF document text
    • http://bangladeshceramicsociety.com/uploads/editor/files/gigugabafigigumiga.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/xadokufoku.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/subifezoraserer.pdfIn PDF document text
    • http://erulingua.hu/uploads/content_files/files/16269548690.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e4a3a4fae6---11016198097.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/84617536283.pdfIn PDF document text
    • http://tranindo.com/Uploads/userfiles/files/58747838391.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/saloxilutaninetegikozoxul.pdfIn PDF document text
    • http://artvideo74.ru/upfiles/files/78966476527.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=spirometry+test+costPDF 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_off0000ae28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC63F 10412 bytes
SHA-256: c0e0179908f179784e1fd75e90e10e763bba97f4f9b57b7fa40a1ca49d2e8325
font_02_sfnt_off0000ddde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDE 15740 bytes
SHA-256: 4c309e8583a38c311d9a4704b037ca794186c1c602983e9c52b36f2e45076364

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