Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc4f857dcfca34a…

MALICIOUS

PDF

86.3 KB Created: 2021-06-26 14:31:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0ff4c9952b6b3308004d419ed0dab2a6 SHA-1: cc41461d3d54fda510fc2f42d334842a2ec58199 SHA-256: bcc4f857dcfca34a5c724f851891aee569687f5d2bd9e979a85f01887b743af3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It functions as a link farm, containing numerous URLs that point to other PDFs hosted on compromised websites. The primary purpose appears to be directing users to malicious content, likely for phishing or further malware infection.

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://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/08c54a5d7d880d2af937e47f84f691e7/bujunovakalenuke.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/4f9e0a4571b734f529ae052fcc3e074f/71453954616.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5056f2011177c5fa4c00c5250d3db401/pizegufar.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0cab51087---80276484972.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/8c69f0ac209233d51b2cdeae5d0c8740/1051895597.pdf
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/89975787712.pdf
    • https://kede.org/userfiles/file/dotidufetujusigavedixoza.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/226144ca4a70f4994cfc6f85670144f6/80238088917.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/82ehpj4asb0p68nmmcj2mapug1/tilijujopijujorodux.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/88872845687.pdf
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/e71060543bcbe31dc71eefdb5bcf0471/48751144194.pdf
    • https://laser123.com/geektic/files/79108198572.pdf
    • http://solidpractise.com/files/userfiles/file/71056621443.pdf
    • http://vce34.ru/attachments/file/matofo.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c709f5a1335---pulimikiziwuxiludeso.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/d3c954bd363b837c6d4dd0e3dd246006/48461434778.pdf
    • https://auto-rujo.com/images-editor/file/nigabixizizofezunibejilal.pdf
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/5r0bg076rva8i16lhpiend5m87/36755698832.pdf
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/m9an8pcem5bm746b58mii2qr3u/getamodo.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1946c2ce55---8693617075.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/d6238d52f4c9a1134eb88a2f8aa03e37/33552177494.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b0ac93979---17576749952.pdf
    • https://kraftyz.in/ckfinder/userfiles/files/61144256106.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/b3321a05a2a6341fdff1cd587726cc23/96956485315.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3cb6a72cd---marom.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160a72315cf35f---50961612597.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/25e3dfc3e8c8f9e80fe66f59b3c103ce/33787790589.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=animal+camouflage+reading+answers
    • 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_off0000e7e3.bin
bfe7278b5fcb2ad73e2243be53bbe883769cb61087763bd0309ad02a69ab390d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E3 10888 bytes
font_01_sfnt_off000100eb.bin
d51a5c34c53e4a8f123de3639a80037bff076ad87c3584377f98911d76dd20ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100EB 20212 bytes
font_02_sfnt_off0001337a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1337A 16792 bytes

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