Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dc6c34cfc81ad2b…

MALICIOUS

PDF

80.4 KB Created: 2021-09-17 22:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d35930b19969a1ef9239563b8f3f3626 SHA-1: 57b60b13493b27fe968b2aa28f0c44533da021c5 SHA-256: 2dc6c34cfc81ad2b27ca6cbf33354adfca4134a4a87a1cb5a28a5b994d1dbec9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which appear to be part of a link farm designed to distribute malicious content or phish users. The presence of 'coin master mod hack 2020' in one URL suggests a lure for potentially unwanted software or game cheats. ClamAV detection and ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://pixomot.ru/uplcv?utm_term=coin+master+mod+hack+2020 PDF link annotation
    • http://matras-devison.ru/upload/file/64801244704.pdfIn PDF document text
    • http://takramaipai.com/mypicture/file/78725628043.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143e94f4fbff---32898165860.pdfIn PDF document text
    • https://booknowrentalimo.ch/userfiles/files/52069224881.pdfIn PDF document text
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/84512785266.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/46608161881.pdfIn PDF document text
    • http://jinshi66.com/uploadfiles/files/29465356605.pdfIn PDF document text
    • https://doina.md/fckeditorfiles/file/19236744909.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/03b3730ae0f916a26b64bf70dcd9a8cb/xixanurubizatula.pdfIn PDF document text
    • http://alanaf.ru/userfiles/files/fepewife.pdfIn PDF document text
    • http://tieclangman.com/Images_upload/files/pibiwapekudakaba.pdfIn PDF document text
    • https://jagamimpi.info/contents/files/26447700915.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/de593187a05d5b29970c85ee1c44cd57/kekekefuxelozepipukoveniw.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///69160126177.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/27589889397.pdfIn PDF document text
    • http://tarnava.eu/user_images/file/lifikipidogugerete.pdfIn PDF document text
    • http://lev-steklo.ru/userfiles/file/44216690481.pdfIn PDF document text
    • https://aznamaste.com/ckfinder/userfiles/files/94463067035.pdfIn PDF document text
    • http://www.toptehnik.si/images/76730771397.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/xuwiwufu.pdfIn PDF document text
    • http://xn--krmer-dnnebacke-1kb72b.de/files/file/56253928276.pdfIn PDF document text
    • https://www.studiorosaliabusco.it/ckfinder/userfiles/files/rimatuvavewuterel.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161379b463c789---44125691933.pdfIn PDF document text
    • http://partner-support.net/user_data/userfiles/files/xavawikamel.pdfIn PDF document text
    • http://biometria.pl/photos_fck/file/tajomezirufubuzonadi.pdfIn PDF document text
    • http://apicn.net/upload/files/moxeligeketajumukasun.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_off0000d55d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55D 10956 bytes
SHA-256: 34185011f690e24177d439ef59b731b274b2f901ee3bc371534b5a2810efc1c2
font_01_sfnt_off0000eea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA5 17616 bytes
SHA-256: 64b2c74dc5654cdb0b9884f9ac8d289d219a2d798db74856fed2d555d36b7e89
font_02_sfnt_off00011bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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