Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d01119e8a88a7c…

MALICIOUS

PDF

94.2 KB Created: 2021-08-07 20:16:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8f18a90b15f487d6370450734951b2e5 SHA-1: c3e57339aac0a860c05d4a5cec167c2f6b97eb96 SHA-256: 93d01119e8a88a7c9d830790aa11e1c3084d2c0d12bed9c7c3f58130c0603927
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised WordPress upload storage, suggesting a link farm designed to redirect users. The primary purpose appears to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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 http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c9735fb70cd---80382842933.pdf
    • http://dearbornshs70reunion.com/clients/c/c6/c6cacd1d9512a3effe7244eb89d69e0e/File/89645825384.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5bd2cb424---gezosanozasewax.pdf
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4c1f733f2---xososeda.pdf
    • http://wabasnb.com/files/fckeditor/file/150266070960c429bce6793.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608559c81e4d2---48056720073.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b29bcd7e7c---79822999824.pdf
    • http://mikomisushiwc.com/uploads/files/wezupuxapixoladakez.pdf
    • https://lecormier-menuiserie.com/www/upload/files/xekokodivelafikepo.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/85351a78ee3b476322457b72f0df5b6d/82706058116.pdf
    • https://ihotel2b.com/upfiles/editor/files/28678042139.pdf
    • http://modellszerviz.hu/userfiles/file/54908955110.pdf
    • http://sammyuriasproperties.com/userfiles/files/36398508486.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608c06d2c83e2---puledunufuvageva.pdf
    • https://inks.bg/userfiles/file/noxuniponixozebupasew.pdf
    • http://www.aportecnica.com/imagenes/editor/file/17690408381.pdf
    • http://music-saikung.com/ckfinder/userfiles/files/kokatuxudoxizisejafuda.pdf
    • https://vmwarts.com/ecovic/file/wavuperipolipipuxe.pdf
    • http://simonkuehner.de/gfx/userfiles/files/zotedosin.pdf
    • http://turagent007.ru/userfiles/file/fosiwanirulabuxotanawod.pdf
    • http://cuacuonductudong.com/upload/files/30985243377.pdf
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a9d663aef---kuvepake.pdf
    • http://bowenworktimmins.com/clients/e/ed/ed750a77e36579213b976c45729ba45c/File/72598282164.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b61f809c55b---lodugopizuto.pdf
    • https://globalmediaminds.com/uploads/files/tobobafira.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a818fb2aa48---zijorogivolodiwujuzupire.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/koiat7e3tt848p2i2mha90im62/pivaroziremog.pdf
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/5545cf9c9725be6506d4671aa2e74de2/9549314221.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=what+does+major+depressive+episode+mean
    • 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_off00010b1f.bin
2cd36bfc0cd97cc7e73829b05d09a2f2c77197b770e79ab62cedc8eddef9b1ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1F 17672 bytes
font_01_sfnt_off00013959.bin
528d8f1b1f4a50169e06e3a0dd6ac608d0d32f292cede70161a0cdfacd9a7aa0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13959 10800 bytes
font_02_sfnt_off00015207.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15207 16792 bytes

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