Malicious PDF — malware analysis report

Static analysis result for SHA-256 93296e424b279e6d…

MALICIOUS

PDF

69.6 KB Created: 2021-09-21 02:13:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 314473258129faa264d843731c046d43 SHA-1: e3c9aec64b74c2b24a0d565ca88d25226bc5504e SHA-256: 93296e424b279e6d31c1335e744a46b045e2f6aed0841b5cc66aa4c9c6963493
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://ketchas.ru/uplcv?utm_term=apowermirror+download+android PDF link annotation
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/b3268615a0049af7cd8f7667948e2a84/famevusenibotob.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/febelizoza.pdfIn PDF document text
    • http://geoman.cz/data/file/34904618793.pdfIn PDF document text
    • https://serviceelectric.ca/userfiles/file/35637671011.pdfIn PDF document text
    • http://montoaneli.com/ckfinder/files/zexizasokorifojiboge.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca9bd6346c---72076574360.pdfIn PDF document text
    • https://i-intelli.com/ckfinder/userfiles/files/24655487855.pdfIn PDF document text
    • http://chornakorn-packing.com/ckfinder/userfiles/files/73627247646.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16144663fa7e00---5235349784.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16136ee1c5cbc3---56640657526.pdfIn PDF document text
    • https://movie2book.com/userfiles/file/vixiwajibewujij.pdfIn PDF document text
    • http://jobsandhi.com/uploaded_files/userfiles/files/femuxukebodifitep.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161359c7af2827---49762645459.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141e45534a10---89261500794.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140a497f215a---56918179670.pdfIn PDF document text
    • http://accronline.com/userfiles/file/zowudawutarojufekekoje.pdfIn PDF document text
    • https://tch.lu/files/files/38473771353.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///sabiseduker.pdfIn PDF document text
    • https://pnlcoach.com/misc2/file/In PDF document text
    • http://sjar-tech.com/uploadfile/file///2021091705541513.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/5bkj0vb0ef0onia95iaerrn85s/mupus.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///20210909145159_148584115.pdfIn PDF document text
    • https://beruanglucu.com/contents/files/nuzusupimuwanopufobolo.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/98a455e87d90683cb26eb7133e42ba32/51264366298.pdfIn PDF document text
    • 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_off0000b58d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB58D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA4 10356 bytes
SHA-256: 394ddfc3c922eb2a85bfdc4f92c0d7448106b2489ffcc879ede6af294ebcc1bc
font_02_sfnt_off0000e4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FD 14196 bytes
SHA-256: 5888d32d01aacc2298d904cbe2f55389feb6358d5ef6db1948e4e8c87d4406dd

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