Malicious PDF — malware analysis report

Static analysis result for SHA-256 a07f7100bbe97d79…

MALICIOUS

PDF

82.8 KB Created: 2021-06-27 17:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 46ef2c2c0d46a805de0eabee2d2e673a SHA-1: c514b3514bb6950a57250985d6a9b804506af3a6 SHA-256: a07f7100bbe97d79310fa6e18b74944afa263ea5dfd5ad0ae4b306c5f86f3d27
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous links on disposable hosting and compromised CMS upload storage further supports a malicious distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/3d3965a7d40a3a4ddc9b2b441d1fdc82/5096397757.pdf
    • http://ackerviewguesthouse.com/userfiles/file/97411780045.pdf
    • http://leinerpakgelatine.com/survey/userfiles/files/zafagurilu.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/s6fjib6achaqj3r9b1hj8lftr1/nebejiwojiwamosopas.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/69b34d80876c23b3967ca5b8f2ff5744/kapasobumorazajobizedi.pdf
    • https://afayl.com/userfiles/file/43398176444.pdf
    • http://fritz-fahrlaender.ch/download/banalaferal.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/8495966f0206cc10d1944452f1f57c08/jotemebog.pdf
    • http://blackhorsesc.pl/userfiles/file/zowidetexomuwenexanagino.pdf
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a9620279edf---52051059497.pdf
    • https://rocksoliddesigns.biz/userfiles/file/ruxetudo.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/3806c26e97a248fd6d007a4622bd2e31/giregewofobele.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b44d591a2f---56501275435.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca44528ad99---64218463731.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16099bfe37e180---wajegudisesofoni.pdf
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/90dd77c6edc69ca44251a523e855adec/16080694725.pdf
    • http://fdscience.com/UPFILE/userfiles/files/71353913774.pdf
    • http://ghalemdi.com/userfiles/file/goxoz.pdf
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/57e02a4fa1381384d8e8adcaea2a8ab7/90379157680.pdf
    • https://brahmagnanam.org/fck_uploads/file/5584798206.pdf
    • http://kapelski.pl/userfiles/file/xikijofewepipuvuxadegug.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/8fc9e1fcfa621ac6401736a660712232/79996716277.pdf
    • http://teormech.ru/teormech/usrimg/file/47278407131.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777f9e1a0f2---68648442725.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=harold+and+kumar+tow+truck+driver
    • 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_off0000e17e.bin
5df47b84a19c2483b946353a252bcac303203538072490df261276d37639f2e5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE17E 16776 bytes
font_01_sfnt_off00010ce9.bin
7f3274f2560690d65f2347a42623aa9aff535009b173bf2f12f3271305e8cc8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE9 10700 bytes
font_02_sfnt_off0001256e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1256E 16792 bytes