Malicious PDF — malware analysis report

Static analysis result for SHA-256 93eb94b9d4dafe3e…

MALICIOUS

PDF

80.5 KB Created: 2021-09-04 13:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f50e74d812a322cb437003aba73f5a52 SHA-1: 2cb33b9d1f51e2d99fb7aacb6b7271c8205f8375 SHA-256: 93eb94b9d4dafe3e8477c04e74b49a0ea3fcccada5b7288d83f1a08f5a152466
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to external websites hosted on compromised CMS platforms, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure as a link farm is designed to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/rbab7f2l3ebukifdpo8kkqmh60/vabivusuwapisa.pdf
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/besiwe.pdf
    • https://sanmuabancongty.vn/images/content/files/desotejajonatasonajele.pdf
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/62859429112.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/dac6eab4419eb340c42e3e421082a8df/fokakuradedogoxuxiw.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609d68266e625---19382065792.pdf
    • http://nsfeed.com/_UploadFile/Images/file/88050862720.pdf
    • https://oklogistic.lv/upload/file/93561780040.pdf
    • http://sweetbasketsbyjackie.com/clients/864293/File/lutunavadunodi.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/u14fjkqdt6vp0rdspkg1mrn193/vemobixoxivufabozamudav.pdf
    • http://lblussana.it/images/file/nitabibi.pdf
    • http://robalton.es/Albums/images/file///67796461643.pdf
    • https://ranagro.com/files/26726411341.pdf
    • https://elesud.it/img_pagine/file/91613646170.pdf
    • http://americanewbie.com/userfiles/file/tozunevodukozuroxi.pdf
    • http://beachfirebrands.com/userfiles/file/28110523030.pdf
    • http://crmrealty360degree.in/userfiles/file/79394143846.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/44d86650308badfba08df1ad4a326d5b/xamupijip.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830dcbb294d---zixafiwax.pdf
    • http://szjwwj.com/userfiles/file///66312345654.pdf
    • http://a-pluset.com/userfiles/nabutosolupuzilunijixol.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609595a23a6b0---2243645532.pdf
    • https://girl0229960192.com/upload/users/files/muwagejujunemig.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=lspdfr+traffic+policer+keybinds
    • 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_off0000d54c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD54C 16792 bytes
font_01_sfnt_off0000ed63.bin
adb02e141d0c1ae1f835d0ffb8f141182e19e870de58f667dc0848c13ee26c29
pdf-font-stream PDF embedded font (sfnt) at offset 0xED63 10916 bytes
font_02_sfnt_off0001068d.bin
681af6b5dfeb29314b320e724f1c0e60bd681d7e220b6b2fa3a8b154dc586342
pdf-font-stream PDF embedded font (sfnt) at offset 0x1068D 17916 bytes