Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec7258f9701bcf3…

MALICIOUS

PDF

71.9 KB Created: 2021-09-25 07:34:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 12cf7d6624469880a5845396abd96f08 SHA-1: 62ada96ac56dbed940c6e289dce022c0951b08c6 SHA-256: 3ec7258f9701bcf3c2e4936d3b938e9151ac926fe21a3f7624100daaebcd109d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and external links suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://philabc.ru/uplcv?utm_term=tickets+for+a+quiet+place+2 PDF link annotation
    • https://transilvaniafishing.ro/app/webroot/files/userfiles/files/5080220581.pdfIn PDF document text
    • http://kuryakyn.ru/userfiles/file/zipuxemuwe.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/63313607617.pdfIn PDF document text
    • https://vinaarc.com/app/webroot/files/ckfinder/userfiles/files/rariluliviju.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/afd6dec2d4fb0c7452526fc0da863891/32934325393.pdfIn PDF document text
    • http://mayingiabao.com/upload/files/soterumutelalaj.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/fibulivulazifewafukeru.pdfIn PDF document text
    • http://alfonsoguiggiarchitetto.it/userfiles/files/xobedasimunimena.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/66409911776.pdfIn PDF document text
    • http://www.celso.org/download/begonowefivunejib.pdfIn PDF document text
    • http://imhome-listings.com/userfiles/files/18131804663.pdfIn PDF document text
    • http://fruhmann-elektrotechnik.at/91181325113.pdfIn PDF document text
    • https://mavibusiness.it/file/bodavatixexote.pdfIn PDF document text
    • http://gospelpour100voix.com/fichiers/newsletter/file/56399653968.pdfIn PDF document text
    • http://missteenqueenuk.com/userfiles/file/nobajaliroxujepegosukub.pdfIn PDF document text
    • https://anitt.in/ckfinder/userfiles/files/50450473672.pdfIn PDF document text
    • http://aasghsflqsae.handylover.com/upload/files/1360013829.pdfIn PDF document text
    • http://rowadhr.com/app/webroot/upload/files/82382714142.pdfIn PDF document text
    • https://hefcom-hydraulics.com/ckfinder/userfiles/files/lolenegowigivufiwobiza.pdfIn PDF document text
    • http://avandcie-automation.fr/ckfinder/userfiles/files/bomovufi.pdfIn PDF document text
    • http://sancheonglittletheaters.com/upload/userfiles/2021/09/files/210920132112.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jikaxanowafezemo.pdfIn PDF document text
    • http://sbairs.com/datas/files/28195877374.pdfIn PDF document text
    • http://www.bongbansaigon.com/uploads/files/bunevomiteroze.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/a3b2e0f6dd5a40bc6aa5b6ef5285909f/kogugigitowavudobu.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_off0000b2c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2C0 10792 bytes
SHA-256: d6085014ab34a88955f99f5617aa64ee54b1e0aba1a53f803e7c9d0280dac19c
font_01_sfnt_off0000cbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD7 18336 bytes
SHA-256: 79c7674ed06f102ba07fd5dab712070ad402b91c2d50c7a7510b3fe1cb599204
font_02_sfnt_off0000fa5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1