Malicious PDF — malware analysis report

Static analysis result for SHA-256 205f2d19b059139d…

MALICIOUS

PDF

87.0 KB Created: 2021-10-05 00:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: e7d6ffc728a464c738e36d67c2f0ab11 SHA-1: a88d7a82f93fc4895410292552e6c25a966539f7 SHA-256: 205f2d19b059139d6acd24944231c213b03a3c9bf191752306c7a817ea7f8e44
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating link farms on such domains. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure itself is designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://smidgel.ru/uplcv?utm_term=how+do+you+spell+favorite+color PDF link annotation
    • https://it-remarketing.pl/app/webroot/media/files/40235745974.pdfIn PDF document text
    • http://piemonteforyou.it/userfiles/file/41133314996.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613e62458c992---xotigudumamelazedaj.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/053fdf27fe49453777cba11f2d62f105/vomizenuwexu.pdfIn PDF document text
    • http://malerbetrieb-malanders.de/Webseite/pics/fotos/1/file/vuwowomusasodizinav.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/temuseregalokokazefeda.pdfIn PDF document text
    • http://rujiahk.com/uploadfiles/file/mowudofobikuraduzug.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/topubevupili.pdfIn PDF document text
    • https://daotaolaixesontay.com/uploads/file/7820656372.pdfIn PDF document text
    • http://ksiclubcom.ksiclub.org/svnprojects/DHD/Source/images/files/gazakevevoset.pdfIn PDF document text
    • https://zhavezbozi.cz/data/file/42151691112.pdfIn PDF document text
    • http://pro-group.ru/userfiles/files/reviwulazetutakamit.pdfIn PDF document text
    • http://labuchedeberce.fr/userfiles/file/wopanodusuravej.pdfIn PDF document text
    • http://hidropro.hu/upload/gamemebadi.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141f19891e16---nukevogetamagixer.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/51478478138.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/9a3915e162efbf70518b27cb2d12a8db/91850793181.pdfIn PDF document text
    • http://centonze-vini.com/userfiles/files/12484994710.pdfIn PDF document text
    • https://metrosecuritynepal.com/assets/userfiles/files/96368455574.pdfIn PDF document text
    • http://polipack.ru/content/file/giguwixukas.pdfIn PDF document text
    • https://masihpt1.com/contents/files/mogefanabawegawafezofi.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1615aa342455bf---60225722414.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/2656858706.pdfIn PDF document text
    • https://rinducm1.com/contents/files/68770395078.pdfIn PDF document text
    • http://studiozoppini.com/userfiles/files/rigowizegavu.pdfIn PDF document text
    • http://balassalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pukivuzaravogenaf.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_off0000e831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE831 20204 bytes
SHA-256: 5d2aa02ba26082e107a32ce89d17804404515bd539f6d3a05510e63860f59c9e
font_01_sfnt_off00011ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE9 10864 bytes
SHA-256: e1b9652abb39c05acc5f31498c3a38ec55c608f68992366082814242276762ac
font_02_sfnt_off00013639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13639 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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