Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc2dc00560ef5a01…

MALICIOUS

PDF

80.1 KB Created: 2021-09-16 21:43:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6964b5027deaee486e9b9b318d30b761 SHA-1: 28e9f55b920a50282b2b353ae53c534b37ea8f47 SHA-256: fc2dc00560ef5a01a8883b8416287816f6be0cc15bc2bae253b889ee35cc3ddb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics identified it as a link farm with numerous external URIs, suggesting a phishing or malware distribution scheme. The presence of multiple unknown URLs points to a coordinated effort to host and distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://evergladesharvesting.com/ckfinder/userfiles/files/vatesam.pdf
    • https://hoatuoi360.vn/uploads/files/71294418489.pdf
    • http://pxmonastery.org/CKEdit/upload/files/75161724514.pdf
    • https://abofahed.com/userfiles/file/nifuxima.pdf
    • http://fredericjean.net/oplusco/file/jufamijirivojid.pdf
    • https://pellevah.com/upload/files/gagajom.pdf
    • http://baheth24aqari.com/ckfinder/userfiles/files/37065148930.pdf
    • http://mehmetrasimmutlu.com/icerik/file/13810954303.pdf
    • https://www.info-service.com.tw/plugin/ckeditor/ckfinder/userfiles/files/81164542423.pdf
    • https://wct.goldcrownresort.com/magazine_files/files/xojajivutaf.pdf
    • http://rancholasmonturaspremios.com/campannas/file/92723984561.pdf
    • http://naoshima-tours.com/images/blog/file/rotepetejebekibivu.pdf
    • http://grafichesirio.com/userfiles/files/pepijedofew.pdf
    • https://smartstone.ca/userfiles/files/88421032785.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/934d7b108a04da28eadd272c78e1e68c/93787440682.pdf
    • https://rpdev.org/ckfinder/userfiles/files/folevexegenizumuxunipop.pdf
    • https://smartech.lv/sites/smartech/uploads/documents/files/22078975264.pdf
    • http://utuin.net/files/fckeditor/file/bedoxevejun.pdf
    • http://abwingssuffolk1.com/uploads/files/88799686437.pdf
    • http://www.clc-engineering.com/siteuploads/editorimg/file/29330358364.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/a72ad3acec1d6f9c3f54b82fa59bb664/26620279347.pdf
    • https://ystechpro.com/nbloom/fckuploads/file/81481936037.pdf
    • https://stepweystudy.com/ckfinder/userfiles/files/7713968627.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=download+latest+mobdro+apk
    • 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_off0000d47e.bin
9b54504efa04b2625e51b4c99e94b5cda0abe7f128d7636f9217e925e976e31b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD47E 17764 bytes
font_01_sfnt_off00010248.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10248 16792 bytes
font_02_sfnt_off00011a5f.bin
6d4c04c7d25e5baf05947e4b883a477fa8f81dafa942de2a92c50fabaec6029f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5F 10780 bytes

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