Malicious PDF — malware analysis report

Static analysis result for SHA-256 606bd1c875e1343b…

MALICIOUS

PDF

73.3 KB Created: 2021-09-09 03:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3055c6f04e7d0a093110918af85b9560 SHA-1: d4b1116ce3863617f829603f0dbb56171f68d01f SHA-256: 606bd1c875e1343b932dddf7576fb29a8bc404b8fa8c4397f5ea2d4f30651af7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one heuristic specifically flagging it as a link farm on disposable hosting. The presence of external URIs suggests an attempt to redirect the user to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=zombie+highway+mod PDF link annotation
    • https://mehreganimaging.ir/images/upload/files/vawogesiden.pdfIn PDF document text
    • http://nemeckystrakac.sk/editor_uploads/files/xulewupum.pdfIn PDF document text
    • http://thaide.org/userfiles/file/wajesikivos.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/79288465345.pdfIn PDF document text
    • https://lecachet.fr/docs/files/vifijepuzezetinubojizitiz.pdfIn PDF document text
    • http://cmrivestimenti.com/userfiles/files/64722792487.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/3bbcb2fb561d27c6d005cd931bc38da8/62930566151.pdfIn PDF document text
    • http://nanumed.ro/uploads/files/xofagejagugenujobafa.pdfIn PDF document text
    • http://thaymanhinhlaptop.com/userfiles/file/wanisidavetijuru.pdfIn PDF document text
    • https://servauto.fr/img/user/file/6972503825.pdfIn PDF document text
    • http://373113.linker.tw/files/nupuguwenobaxim.pdfIn PDF document text
    • http://tyextractor.com/d/files/52042630279.pdfIn PDF document text
    • https://businesslife.com/content/files/vadidumumapomibifodo.pdfIn PDF document text
    • https://kaparatt.com/images/File/subosaguzudazegus.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/hjdpris98jt0sc1c5tc0ug7lin/62819875127.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/38880697513.pdfIn PDF document text
    • https://mimpiindahsatu.com/contents/files/30162230256.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/solofiribudusobivuxasujo.pdfIn PDF document text
    • http://yjccnc.com/upload/files/81787375520.pdfIn PDF document text
    • http://kientrucnhacuagio.com/upload/files/97459290091.pdfIn PDF document text
    • http://michellenevinracing.com/FCKeditor/file/zubolomadali.pdfIn PDF document text
    • http://islaminkiel.de/webmisr/uploadwebmisr/file/furafufewex.pdfIn PDF document text
    • http://cheumst.com/upload/fckeditor/file/towotosinuzowegof.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/39102828523.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_off0000b88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB88F 10484 bytes
SHA-256: 09efca4063f54aaab8598e6ddb97372981d4ad9487681cac66813896578353d7
font_01_sfnt_off0000d038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD038 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e84a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84A 18240 bytes
SHA-256: e5d124871a471cc868477dae396ec88bab2b3eafd0307fb1db83afade7aaa58c

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