Malicious PDF — malware analysis report

Static analysis result for SHA-256 d568d9cf0ef0b11d…

MALICIOUS

PDF

80.0 KB Created: 2021-07-03 06:14:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f1c1d7982b4f31cb4d14a2cf5f547363 SHA-1: d649c0d8326ad3cdd8201a809f2498718b360e9d SHA-256: d568d9cf0ef0b11de5eb70278f3d6e890f351389a0bae6bbb55c55046ac967d7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external WordPress sites, many of which are hosted on disposable domains and appear to be part of a link farm designed to distribute malicious files. The presence of a 'download button' lure further supports a phishing or malware distribution scenario. No scripts were extracted, but the overall structure and URL patterns suggest a phishing or downloader attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • 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://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8f0852d92---pipogol.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/sb0e5scmk72ooe7s9d6rj6aa0k/fomimuzapoj.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c02e6281537---54179731192.pdf
    • http://tovicetour.com/FileData/ckfinder/files/20210614_CE270EF7588DC0C0.pdf
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/d1ed6aa47233b1c2054e8635bbcab2c2/megegip.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095bf0ccd5dc---40087414106.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16087b34294a51---7899719935.pdf
    • https://atlastoursntravels.com/userfiles/file/kewibuburovosevovarorupe.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/5hv7eugkoubutl43uue8390hi7/nabumowul.pdf
    • http://ahxxzx.com/userfiles/202106/file/19852930474.pdf
    • https://golf-tout-terrain.com/publish/page/file/linemuzejerusiles.pdf
    • https://psychologgia.pl/Upload/file/kiwamopug.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ec52db5e6af1a8152de247e3a801f74e/52683046227.pdf
    • http://blpest.com/UserFiles/file/29589149626.pdf
    • http://yokohama-model.com/userfiles/files/5192900361.pdf
    • http://asesorgubernamental.com/images/file/falibuwodosa.pdf
    • http://kondicionery-vidnoe.ru/upload_picture/file/vekobifijebudezudogowitox.pdf
    • https://liniagdanskzydowo.pl/files/vuxozubekuledidulugafijo.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160af061d5c891---81638285684.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acbdbee9b5d---35611799821.pdf
    • https://familienbilstrup.dk/userfiles/file/31603456857.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b96d0d30f---60672602989.pdf
    • https://kmkmekanik.com/upload/ckfinder/files/boxorudaboke.pdf
    • https://efnnma.org/files/file/21472475415.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=pharmacology+notes+for+pharmacy+students+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4ef.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EF 16792 bytes
font_01_sfnt_off0000ed06.bin
af0b53763522d97f99bc1a8c5b04b9839cbd92d0c23b631042ca1d8ecb10664a
pdf-font-stream PDF embedded font (sfnt) at offset 0xED06 11192 bytes
font_02_sfnt_off000106ed.bin
b231bfbf1027c6ed63ffb5b9402fef954ae4eeae18389c4a5e210f0bf3628b7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x106ED 16760 bytes