Malicious PDF — malware analysis report

Static analysis result for SHA-256 01595484b7e3bb21…

MALICIOUS

PDF

81.7 KB Created: 2021-09-20 04:59:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3096d4505368a9281cd9cc6e5f83f032 SHA-1: b588fa0d008b152ea72161b33bd866beca267978 SHA-256: 01595484b7e3bb2101289eaf585b4fb9d1fc6a86cad6211318a95f7a696cf78e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, suggesting it is designed to redirect users to potentially harmful websites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm on disposable hosting, a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://termokingbt.com/ckfinder/userfiles/files/nununenizogewoz.pdf
    • http://schodylux.pl/userfiles/file/98080261074.pdf
    • http://broadgatecapital.com/userfiles/file/47271722019.pdf
    • http://ameshamagazine.com/js/upload/files/27158918385.pdf
    • https://pensiuneavalentina.ro/app/webroot/file/baxakewonotibumepa.pdf
    • http://sunrui-ti.com/d/files/21234942110.pdf
    • https://get-insurance.in/ckfinder/userfiles/files/xikezerejivitugesebu.pdf
    • http://anticacarsulaeborzoi.eu/userfiles/files/13795924881.pdf
    • http://ttmplus.com/userfiles/files/18264195578.pdf
    • http://laduses.nl/image/file/50028616467.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/669e5c91c1ceaf417bb17d2a7f871141/rufojab.pdf
    • http://adamex.ukrkarta.ua/fckeditor/userfiles/file/fabodaxora.pdf
    • https://jocafoto.com/fotos/file/kosupidonowalapazefuba.pdf
    • http://samurairamenbar.com/uploads/files/78000349226.pdf
    • https://aquatrustfina.com/userfiles/file/61976969119.pdf
    • http://landroverbh.com/ckfinder/userfiles/files/52472023248.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614113446b0ab---29211796201.pdf
    • http://kerekesvillszer.hu/UserFiles/file/pavejepisevir.pdf
    • http://hlqh.net/userfiles/file/20210902120755_229890696.pdf
    • https://megatex.ua/images/uploads/file/13706359695.pdf
    • http://dreambeauty.kr/upload/fckeditor/file/7147247503.pdf
    • https://proxus.nl/file/67858461520.pdf
    • https://davaocarrental.com/images/file/90944887383.pdf
    • http://myphamlulanjina.com/upload/files/28192494141.pdf
    • http://lovesushiscv.com/uploads/files/88566305769.pdf
    • http://marinda.ru/pics/images/file/mepemofudubasonedizopiwe.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=android+coby+tablet+update
    • 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_off0000d9c3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C3 16792 bytes
font_01_sfnt_off0000f1d5.bin
0cd0190289952af3e183186bb2bcbf4a6c64547c513a25925ef30c6a7ca86274		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D5 18032 bytes
font_02_sfnt_off00012082.bin
e53c8619adf436102e5d7c10dd8b7bfaf913693d5da519a18aeea4e1f3017925		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12082 10672 bytes

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