Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f7f72d1dcdf005…

MALICIOUS

PDF

85.9 KB Created: 2021-09-19 03:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b5aa724f81085b3ff292a8ca6b7d0efb SHA-1: 7f405c56229e3dff3c3b2df9b42627a02e8fc603 SHA-256: 96f7f72d1dcdf005437e6982c83895599e126901aa326957d009f38e967670b7
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript (T1059.007) is a common technique for exploiting PDF vulnerabilities or initiating malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://asude.istanbul/ck_images/files/20075290596.pdf In PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141e380d02a2---wivamiwutut.pdfIn PDF document text
    • http://xn--22cjbbm2eyae3ehabdb4kqdtae3dxnnc1fhf.com/user_img/files/sojibinosa.pdfIn PDF document text
    • http://lsneotek.com/ckupload/files/zovibumamamavew.pdfIn PDF document text
    • http://anm-av.de/uploads/files/wafadosu.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/67325147633.pdfIn PDF document text
    • http://bonaparte-kerkrade.nl/fckeditor/ckfinder/userfiles/file/98388781160.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/tikorililoxi.pdfIn PDF document text
    • http://burattinojatek.hu/userfiles/file/pitaxagipufepigibivu.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/5213649819.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc099586f3---fovakeriravovo.pdfIn PDF document text
    • http://chromowane.com/userfiles/file/vajikivixipot.pdfIn PDF document text
    • https://rireenfrance.com/images/upload/files/gijipepopu.pdfIn PDF document text
    • http://nanchang.chinatupai.com/web/js/ckfinder/userfiles/files/dotiti.pdfIn PDF document text
    • http://lovepetclinics.com/file_media/file_image/file/jatiwupemogeve.pdfIn PDF document text
    • http://verzorgingsindex.nl/images/uploads/rikoduzemamilat.pdfIn PDF document text
    • https://gdwtechnology.com/fckeditor/file/In PDF document text
    • http://runwellconsulting.com/file/file/94994694442.pdfIn PDF document text
    • https://renault-service.com/userfiles/sixaboserax.pdfIn PDF document text
    • http://giovanninociti.com/userfiles/files/6117923855.pdfIn PDF document text
    • https://skatrip.com/basefile/skatripcom/files/10140159340.pdfIn PDF document text
    • https://limsurdua.com/contents/files/83688014853.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=cara+download+lagu+mp3+di+androidPDF 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_off0000ec6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6A 10728 bytes
SHA-256: a8a3ba6d0ce05a9845ca4699b2cf88ad197d026db2a1c31dd01eb583e30bc9de
font_01_sfnt_off000104ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE0 17248 bytes
SHA-256: 6f7eeb87fa542106b80e8458fb5e25dde80908befaf2bf42aad54d561674ad7f

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