Malicious PDF — malware analysis report

Static analysis result for SHA-256 9342f27eb41690a6…

MALICIOUS

PDF

82.2 KB Created: 2021-09-23 21:35:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6a876ae4682df7da1d64c077670e3e15 SHA-1: 1b2244864474d17f049e51590839b5e64eb4cf77 SHA-256: 9342f27eb41690a68662f11f157348462fa2f3bda2017a37fa00c801cd874469
126 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. It contains numerous embedded URLs pointing to potentially malicious or phishing sites, suggesting a lure for users to visit these external resources. The PDF structure and embedded links are indicative of a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • 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://allytemp.ru/uplcv?utm_term=pathfinder+lost+omens+gods+and+magic+pdf
    • http://speckletrack.com/update/editor/file/70941487740.pdf
    • https://vanchuyen.pvl-soft.com/site/files/salosuguw.pdf
    • http://inhome360.ru/admin/ckfinder/userfiles/files/gafefivewilud.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613587c54e298---52012606053.pdf
    • https://dol-rtknetwork.com/uploads/files/89634627968.pdf
    • https://badoza.net/userfiles/file/85270191633.pdf
    • http://herborgthailand.com/file_media/file_image/file/dajuzugigutawamujutoxes.pdf
    • https://alternativecarrepair.nl/userfiles/file/nerokuzesamidunopaduriro.pdf
    • http://botosani.ro/img/uploads/file/53658140229.pdf
    • http://ahnil.com/userData/board/file/26026828113.pdf
    • http://anais.terminarz.online/kosmetyczka/krakow/files/46922173745.pdf
    • http://somkuthyoptika.hu/editor_up/lujewinugojiwupuxinagonij.pdf
    • http://architettorobertafasola.eu/userfiles/files/kefevedufenalaj.pdf
    • http://spakimthi.com/upload/files/2335354578.pdf
    • http://globalsocialwlefaresummit.com/app/webroot/uploads/ckuploads/files/94113622562.pdf
    • http://pronobile.de/catalog/file/xexuxo.pdf
    • http://fogathajtohirek.hu/fckfiles/file/44816418965.pdf
    • https://tiguan-wiki.ru/file/bebofuzowikojofipokor.pdf
    • http://paoladebenedetti.eu/userfiles/files/86418209646.pdf
    • https://farmacieitaliane.com/documenti/file/3513358023.pdf
    • 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_off0000d9b0.bin
ea9e481d2bc7917634c3c48352a5c7d62109840f3f79cd59092ad4a766d3513b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B0 11068 bytes
font_01_sfnt_off0000f30f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF30F 16792 bytes
font_02_sfnt_off00010b21.bin
83cceb03553a276b8c7904dbe02fc7bb9b94c8a04adfe9467c367cd5634a8365		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B21 18484 bytes

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