Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c6f21d219550e49…

MALICIOUS

PDF

87.6 KB Created: 2021-09-11 01:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 0f9b6bbf04cf3534caa19b796517e503 SHA-1: 6ba2ae071ab926d4e4e18e9fdafe79766e0ddf90 SHA-256: 0c6f21d219550e49de2cd022ad2c50d9e200cb01b51f6e97effb17ede5c1cf90
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://krakowska98.com/zdjecia/fck/file/jajevafibuzoxibililetefe.pdf In PDF document text
    • http://status-go.net/gfx/userfiles/files/tavimefeteluzebitere.pdfIn PDF document text
    • https://curvy.tw/upload/files/febugek.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/dabigabijefuvibuletemine.pdfIn PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/67423895415.pdfIn PDF document text
    • http://ahzycw.com/upload_fck/file/2021-9-7/20210907032247180207.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ffb7ba527f---zonowalunop.pdfIn PDF document text
    • https://mkycc4.com/kycc4.com/userfiles/files/rozireka.pdfIn PDF document text
    • http://architettoangeli.it/userfiles/files/katok.pdfIn PDF document text
    • http://www.recko.ru/ckfinder/userfiles/files/81232971952.pdfIn PDF document text
    • http://hhsmelt.com/upload/files/dubanovisafox.pdfIn PDF document text
    • https://hoangphatdanang.xetnghiemadndanang.com/uploads/image/files/42853537726.pdfIn PDF document text
    • https://ichapps.peaceofworld.com/ichapps/ckeditor-ckfinder-integration/uploads/files/vuribofaroba.pdfIn PDF document text
    • http://tindangnhadat.vn/upload/files/84719893387.pdfIn PDF document text
    • https://4of100churchstreet.com/assets/media/files/13105706665.pdfIn PDF document text
    • https://506hlapeta.com/files/file/2585208354.pdfIn PDF document text
    • https://kominove-centrum.cz/media/files/file/bujefuduzawej.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/45340c310c8425fb84afbf45e58b7e00/43984475577.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/13984661291.pdfIn PDF document text
    • http://contextuae.com/resimler/files/99915614181.pdfIn PDF document text
    • https://tutorsbureau.net/userfiles/file/timogekidinam.pdfIn PDF document text
    • http://muacuoi.vn/Pictures/files/17708562281.pdfIn PDF document text
    • http://nensi.si/upload/file/15566201921.pdfIn PDF document text
    • http://quincy.pl/ckfinder/userfiles/files/47785480156.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=conjuring+3+full+hd+movie+downloadPDF 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_off0000eae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE7 19740 bytes
SHA-256: 5cc7a5d2f365227b82502aa2cdbb31cc0172e8df8dd57899f90a89d126242325
font_01_sfnt_off00011f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F09 11120 bytes
SHA-256: 4db1160fc78f7caecb1ab285872ed8a1e10538caac26fe9912040d7568be858a
font_02_sfnt_off0001389f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1389F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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