Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b33b0839f8f4a0…

MALICIOUS

PDF

87.4 KB Created: 2021-07-08 09:55:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e9f51a4dce9537b9e415253069d87efe SHA-1: c7b208f54501ad5c333d976289414746f60de8ff SHA-256: 69b33b0839f8f4a048f0ff5a71fce0a15634992249f8d4f9f1a4b2ec95a67a2c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload directories, suggesting it's used to host and distribute malicious payloads. The presence of external URIs and numerous links to potentially compromised sites supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f89a869f14---85482412046.pdf
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/0fc6befa9cb2ebeead6dc09239a3a6e0/64469637924.pdf
    • http://yaeram.com/userData/board/file/wuxitavosu.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/33637c969493a14f7204407cb145df0a/tedatovekefakimadimoveti.pdf
    • http://lezeckastenakosice.sk/upload/files/momuzutulapifizidamozen.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/a459ecd320d37bfb6cb86ef5833415ef/21886839188.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8c3ef4085---faxenas.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/eg9cbeq68e4g2jub8js8liefk0/didutufonovuropi.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b90db02d8c---dipurixa.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/4cefbd09ea97423e8d58bcade6a34b3f/8734333545.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079426b7e2ea---guropibenu.pdf
    • http://wksystems.net/HotelEstimator/userfiles/file/79030255958.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4da93c72b9---5092290015.pdf
    • http://pelesiuvalymas.lt/i/File/74879243072.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/ac0dcdc5d5a17d5664f0e80fad8da4d2/xujutegaxumo.pdf
    • http://balcimimarlik.com/resimler/files/73731324552.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/0ukrt08pk77if7vjk5llprjrk2/36362430981.pdf
    • http://condosworld.com/abisol1/userfiles/files/11871591245.pdf
    • https://luminex.pl/upload/file/laligenajujituxerexab.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160b72b4857d17---98874741770.pdf
    • http://1careglobal.com/upload/files/73440043242.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb0f10d509---43149194704.pdf
    • http://davidlbrooks.com/clients/868292/File/49959295997.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c92d25b0a98---metokix.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=cowes+beach+isle+of+wight
    • 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_off0000f2bb.bin
daae2d97df130813458bb37611bddb49ccc1a805926949a8331e797099fed100
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BB 10668 bytes
font_01_sfnt_off00010b75.bin
3f5c376c494ed5b9f9177f5af4433e17b61e77a10a4bf0ad6c1ff46909312166
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B75 17016 bytes
font_02_sfnt_off00013830.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13830 16792 bytes