Malicious PDF — malware analysis report

Static analysis result for SHA-256 deff06c602ff95bb…

MALICIOUS

PDF

81.3 KB Created: 2021-09-08 21:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3c2d4fb94db3477a6ff5d3308f44387e SHA-1: a81244db202a3306e9a11a7e7e0b9ed7fdf7d585 SHA-256: deff06c602ff95bb308c8d59d7d8cb6231e93f0c13123be44efb02214356db01
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to disposable domains and are structured to appear as file downloads. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a high likelihood of this document being part of a phishing or malware distribution scheme, aiming to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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=cash+for+steps+download+apk PDF link annotation
    • http://ukkies.be/userfiles/file/85928983660.pdfIn PDF document text
    • https://cmflower-kkc.com/ckfinder/userfiles/files/55761280950.pdfIn PDF document text
    • https://rais.bg/uploads/file/65143717233.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/pujopul.pdfIn PDF document text
    • http://runwellconsulting.eu/file/file/fasejakides.pdfIn PDF document text
    • http://mail.me.ntou.edu.tw/ckfinder/userfiles/files/20210908_035701.pdfIn PDF document text
    • http://ajeah-intl.org/fck_image/file/mubened.pdfIn PDF document text
    • https://mgc.to/sites/web/upload/files/73252483885.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/lenolufuvo.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/bivewabeziluwudimisujuruk.pdfIn PDF document text
    • https://vhssirimpanam.org/ckfinder/userfiles/files/fenizazizesoraroneban.pdfIn PDF document text
    • http://immobilieninvestors.com/userfiles/file/xemobiwobokowar.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/jujosoris.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/a2da02db4c076621c5f402705520c516/fobav.pdfIn PDF document text
    • http://scarpatti.com/files/nokofakabagajeba.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/010901513510.pdfIn PDF document text
    • http://fantasymusic.it/userfiles/files/pokeja.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/34784871392.pdfIn PDF document text
    • http://rockpapersun.com/upload_mce_image/file/47185562352.pdfIn PDF document text
    • http://ros-audit.com/i/up/file/62532350728.pdfIn PDF document text
    • https://tagoproperties.com/ckfinder/userfiles/files/95511272918.pdfIn PDF document text
    • http://ybshajiang.com/userfiles/file/2021-09-06/210906183031303433dleabyttyew1.pdfIn PDF document text
    • http://jrecchina.com/ckeditor/ckfinder/userfiles/files/87230380846.pdfIn PDF document text
    • http://www.udelimpa.es/ckfinder/userfiles/files/33846561896.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE8 18496 bytes
SHA-256: e76512164932f9a84386c3f25f45373a605cbd6464afb39f47018d7728f6c316
font_02_sfnt_off00011f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F99 10712 bytes
SHA-256: 58e1c2387ecee1c19ac7a04b94ac1a39f1ec63d41af1a0e351520468fb1cc125

Open this report in the interactive analyzer, or submit your own file for analysis.