Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed610f8b0b0aadab…

MALICIOUS

PDF

80.5 KB Created: 2021-07-01 13:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d8d91ea9a1058d198ca98e60a23bc107 SHA-1: 6762c74e7f4b8b84f6b8d96e723756744477ac4e SHA-256: ed610f8b0b0aadab7e76cb6fd437eb76c961f19a1065ba0d8312e872d3d44ff5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a link farm hosted on multiple compromised websites, designed to trick users into downloading a malicious file. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure suggests a lure for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/m2gbp2p2qpt3gpnmeehi32t9o1/bexes.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afd5063bd46---wowufuwavi.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4d8b4c540---81594386943.pdf
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/d8e55602dfb4efe10b226706d433bee3/towopifugosig.pdf
    • https://namratalakhotia.com/userfiles/files/26782416050.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/6268c3d95bdcd8bfe2f7a75d44bdd988/gulovinede.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/62bfd45f7f7fd5a3a82810681e3c60a8/fevebimevukowotuzu.pdf
    • http://konemara.hu/userfiles/file/zubavaxenaloxatemitijeluf.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/16074675d30d8e---30064797438.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608e029a14e5d---76140362866.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608098a34dbad---nunazel.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b647acac45d---60039680207.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076358a72e69---xemaxi.pdf
    • http://debsluxe.com/clients/1/17/174397649ed9f07baa8f9d9f48c72a4d/File/43897814843.pdf
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/ebbdju9j6a2rchmtglql6vn0ur/kuxomukotufajezigikid.pdf
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/55456808623.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/2374613e1c556afeda6be00cd4463113/japegedi.pdf
    • http://pobierzplik.pl/uploads/files/57564663911.pdf
    • http://dent-pro.cz/pic/file/wegaru.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/34e7b2b8d2190532ed8a1c6f175a461d/depudimimuxezuga.pdf
    • http://wmc21.com/ckupload/files/xagodudilemozijolitenizuw.pdf
    • https://clubslotalmatriche.com/calcas/file/94386577892.pdf
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/todamogikivede.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/ef40215481c657dc89c62dc8cbdf6c22/faxuzulumumiposi.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/79be36a652f3b4a9e1bb0dea84ba817b/70047125743.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/82a73de0b46b2c6426da253721252f07/92979560544.pdf
    • http://busankid.com/webfiles/board/file///21983542896.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=pdf+book+of+theory+of+machine
    • 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_off0000d3dc.bin
45dd4ac39b8b1ee22841571089d53a4d2fba4663765d03204d56a4d5dc51e7d5
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DC 10876 bytes
font_01_sfnt_off0000ecdc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xECDC 16792 bytes
font_02_sfnt_off000104ee.bin
a8ffd4e9777ed8a65791e6390d8cde5b5730a1f3590a9c32326ed2b1bffbefb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x104EE 17660 bytes