Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda13087ee423471…

MALICIOUS

PDF

85.6 KB Created: 2021-07-03 14:06:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b270e75d4a66098ae78b97542cb80f9d SHA-1: de35d4ad3e40492ddcf69ae7acddc0a2a222b023 SHA-256: bda13087ee42347140a89bc680a5e01ace85a8c822c938ee386ce236f9891e6b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are consistent with attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://korsorlampang.net/user_img/files/tujamumukipi.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/ar108ctg3r2rnasd5hn1ooqt20/55875696754.pdf
    • https://abeess.com/userfiles/file/perugiduwafapopolovukewo.pdf
    • https://senfina.top/uploads/files/fujepaxenasixemujikur.pdf
    • https://t2sc.me/userfiles/19785855849.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/2i0ed93c56n95isnamsbt0tsi0/17886619232.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737400049d7---kegoso.pdf
    • http://hoadon-dientu.net/images/files/62443207849.pdf
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/5eb455e7a43ef9ef457939171368da3b/65440377209.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a949e6e8370---virawe.pdf
    • https://akapacha.com/userfiles/file/1836997959.pdf
    • https://aawyx.com/sites/default/imageuser/file/gibeze.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160718fe3336b0---vagijeminikixabaki.pdf
    • https://hpsoft.shop/upload/files/mikebifatadugesejuzebobo.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5845e8e7a---76703617868.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/139ac5280f64d0c1e849742006f49ddd/gemizaxuxaponifesoluxarod.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/3854857b0f93b4be57be465b2358c5cb/31957428384.pdf
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/d78dc217d189f62a49b3ce8d02da098e/tijidirarefopunedi.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/3e4167c8996d5c8de9ee7c6429d0a770/bavova.pdf
    • http://botosani.ro/img/uploads/file/pexaresugu.pdf
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/03e8ec06eabd01fd232231be42388bc1/xorebejatekexokal.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073fc4199181---15343444747.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/35341c95c228e451f8f5c2ec15d6e869/pipejinugofawa.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4da7a4e5c---25826830219.pdf
    • http://siembra.me/uploads/files/suximegebobokeritevi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=hc+verma+class+11+physics+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_off0000eafc.bin
1cce76b04a401dbd5e7e773b7c92fe6cf3215e577f9333a033fc1f8e4aef9380
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFC 10992 bytes
font_01_sfnt_off00010461.bin
a54139967328a05d084e952490136cbd30ef07c0a3c972f670bf0b6f24a49889
pdf-font-stream PDF embedded font (sfnt) at offset 0x10461 17124 bytes
font_02_sfnt_off000130ac.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x130AC 16792 bytes