Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5a8123feb9abad0…

MALICIOUS

PDF

85.6 KB Created: 2021-07-07 14:36:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5dd44a8ed29af13ea7b6d2890c760f4d SHA-1: 29723e96755bd8b2d7cec3dc22485a779c887d09 SHA-256: e5a8123feb9abad02cad371ebbc05ebc0dfd9366fc80616c53d58a4bf929731d
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The embedded URLs, such as http://www.qookspot.kitchen/..., are likely intended to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • 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.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160cc5e2542ab8---5181152160.pdf
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/as9n6iee62o0nkihstqbli0q02b0g71i/33813472258.pdf
    • http://union.travel/ckfinder/userfiles/files/90990610524.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/5neb1hqakhulmgj9gtfp372h1v/11688992395.pdf
    • https://soalmatematik.com/userfiles/file/magurufarudujibugininew.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b7538822c1c---kamagotuzukolepi.pdf
    • http://zoncmswebsitebeheer.nl/files/editor/file/78832502785.pdf
    • http://yomamasushitogo.com/uploads/files/soketibuninipuxibogutinu.pdf
    • http://meble-tk.pl/userfiles/file/doluwelin.pdf
    • http://kotolantopeni.cz/file/lipazowamumibizotib.pdf
    • http://autowassenindex.nl/images/uploads/piborenadapaxojejepanul.pdf
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/56517471951.pdf
    • http://tpdw.pl/userfiles/file/dopamefovaxutozi.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16093f3a9d7aaf---faworobupojikotow.pdf
    • http://maxidmum.com/images/upload/fck/file/67901584594.pdf
    • https://emilline.dk/ckfinder/userfiles/files/ludowopabumowoseredaz.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1609859c76c615---52369129356.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d863df566---peluxadetibozorugelox.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/2hr08k4akqqkslh162m71fn6n5/gogewedemutazetipu.pdf
    • http://inter-travel.hu/_user/file/sobafuzulixudokeruvak.pdf
    • http://aeronautike.com/userfiles/file/woxokelazegifejosazadus.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b7fa053b4---xukodibavalakipupa.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/246314c2d4a4cea70964ad10b0f98c05/zikofowatopezivis.pdf
    • http://bisenzia.it/userfiles/files/16810727456.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/400a0821cdecaa6b68815e48abbf7876/17147469146.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=isa+instrument+data+sheet+excel+free+download
    • 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_off0000e93f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE93F 16792 bytes
font_01_sfnt_off00010151.bin
aac1856524a05779b0fdf1ced6e17dc0a3fe2e1da56ab5ead7a19ce1462c85f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x10151 16984 bytes
font_02_sfnt_off00012dc8.bin
859a01480ad31b35eb90888b3ce051e7be9526357f0ca7143a992fd666385a85
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC8 10980 bytes