Malicious PDF — malware analysis report

Static analysis result for SHA-256 296bf5cb41908ed4…

MALICIOUS

PDF

98.8 KB Created: 2021-07-23 10:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 4fe54019adf1c814f4b7d4fc8b063058 SHA-1: ccfba273843d68c9dbc8e1c02019eb95cd997d0a SHA-256: 296bf5cb41908ed41e610ceb137713ec0a69aac9086a1fb6b3eb928129b47903
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://sharon-barron.com/userfiles/files/xasutorivujaku.pdf In PDF document text
    • https://armandofalconi.net/userfiles/file/54968066039.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/87efd922d5256e213289b538a5c32baa/48093869835.pdfIn PDF document text
    • http://enslev-anlaegsservice.dk/userfiles/file/25707183061.pdfIn PDF document text
    • http://waukeganeast1980.com/clients/877304/File/37545994771.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/tuzune.pdfIn PDF document text
    • http://unsersohn.ch/images/file/jeniba.pdfIn PDF document text
    • http://www.dilipprabhavalkar.com/images/file/simetitezopoxew.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/63234660803.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/bd38d52d788c5285f0776ffe1b23ede4/suboxadejuferusirero.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607acc458679a---nakodagi.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/rafuvizenizobinorabi.pdfIn PDF document text
    • http://imaginove.eu/data/Files/zefanoteb.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/viwozoguxoneli.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8d972a254---legebolodiwaludemukegax.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/45368260236.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/027bbe84f459429a7bcce588e57ba466/letim.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/f7b9e2ca77c1d091b6a4df8f365420b4/81446522607.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/6d9556a8b2d7a85be7628f18feb714b5/wesasujakuben.pdfIn PDF document text
    • https://ehlibeytalimleri.com/resimler/files/5761322768.pdfIn PDF document text
    • http://border-inn.com/CKEdit/upload/files/37710166488.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aca2982c7fa---zawuzatazo.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/tizado.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/5daa3e8c9efd51c0addef5a2af34a8c9/mezamolinizoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=blood+sisters+castPDF 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_off000121d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D3 10312 bytes
SHA-256: dac2be0da98b1b4da744d56632305dd27a3195738d60eba610d0dcd7f2fd6088
font_01_sfnt_off00013930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13930 17140 bytes
SHA-256: a065ecf3c73dd1ee1cb8a37c147953e247306c729f866be7a55c9fb388bc6fc8
font_02_sfnt_off000165d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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