Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d7387ae80d75dba…

MALICIOUS

PDF

87.2 KB Created: 2021-08-01 22:19:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aabedd3a6201a61bd4374a21f35d0c62 SHA-1: 21aa3e900096815a2b827730eae004b46d779e81 SHA-256: 0d7387ae80d75dba72237af9191a7e0fbfec9acbdcd3f7f6367e141b3e2a97f9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to compromised websites, suggesting it is part of a phishing campaign to distribute malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and link farms on compromised CMS uploads points to a distribution mechanism designed to trick users into downloading files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://adirondackseafood.com/ckfinder/userfiles/files/47972797208.pdf
    • https://agrilaui.com/userfiles/file/vonir.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160c9e8dd70e7b---ziwowob.pdf
    • http://collegedelunion.com/clients/76066/File/95958566886.pdf
    • http://autohondl.cz/userfiles/file/83983423956.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/87a629931808e4acf463731e39eaef12/dufitilogu.pdf
    • http://teusz.pl/UserFiles/file/39458538852.pdf
    • https://mokhalasati.com/userfiles/files/zurawajumijen.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160fd037c304aa---67345770752.pdf
    • https://infoenergie-loire.org/userfiles/file/dimesuduporodova.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/4ntjl00hugannnft03mscmnvh3/datumusapafedemaweguta.pdf
    • https://arrayamed.com/userfiles/file/72391687439.pdf
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1608a40dbc16f0---25510545836.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/e348ee7e9a0ee3938144ef98a96d6990/rovikomirelegibilusezeta.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076be0735771---52231602234.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b097b7047db---sedulegi.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1896ee5de---dakepupevu.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3ed97e34e---rodatakarezilovitudabuzem.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b05d66d9291---xupulufotapagu.pdf
    • http://kameleonhastanc.hu/files/file/rulavezopapuj.pdf
    • https://accuratesearch.com/userfiles/file/bumejepa.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9fb4b409bd---44029312401.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdfaebd44dc---72502487947.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=windows+10+iso+direct+download+link+%282020+version+1909+and+2004%29
    • 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_off0000ecff.bin
102891d41f2260046f2617c23c80f9919fd365f30e66b1408ed50d41ca6c4744
pdf-font-stream PDF embedded font (sfnt) at offset 0xECFF 11296 bytes
font_01_sfnt_off000107f2.bin
d8584e7e358357ceca2bf95f8b699765ad8c3afe59ddf1066d0555f0d4e42c3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x107F2 17180 bytes
font_02_sfnt_off0001349e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1349E 16792 bytes