Malicious PDF — malware analysis report

Static analysis result for SHA-256 860fdb094c9df041…

MALICIOUS

PDF

81.0 KB Created: 2021-09-17 15:58:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 87b74a36313364ca05f32b610d0d801d SHA-1: ba645814b53d123ff666d8a7a58c327689ff9daa SHA-256: 860fdb094c9df041dcadaf81c53ea3b1caa361072152e2bab9be91a8545fdeff
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://pistant.ru/uplcv?utm_term=for+life+free+stream PDF link annotation
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613bbc604a307---58950285859.pdfIn PDF document text
    • http://sportingclubalbinia.eu/userfiles/files/46643068791.pdfIn PDF document text
    • http://pengyou-english.com/FileData/ckfinder/files/20210901_68CF725F591E8709.pdfIn PDF document text
    • http://sweepinstyle.com/userfiles/file/21725080107.pdfIn PDF document text
    • http://jobsandhi.com/uploaded_files/userfiles/files/bikadomovoponoruseji.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/zubuwelizadalimimo.pdfIn PDF document text
    • http://shippingengineering.com/files/ckeditorothers/gulovumigobakerowu.pdfIn PDF document text
    • https://almavilag.hu/files/files/83111783806.pdfIn PDF document text
    • https://efficientinfocomm.com/ckfinder/userfiles/files/weborugotopufowa.pdfIn PDF document text
    • http://mezon.jp/userfiles/file/gaputasavetitamoxopuk.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/dopewigebigi.pdfIn PDF document text
    • https://www.kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/kaxifojinomenubuk.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/dutosexulatutagudulewamok.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/89396901253.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/67951650703.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/13283956442.pdfIn PDF document text
    • https://szemvidito.hu/sfwkr/feltoltesek/Images/Image/tinusamewotuvojakix.pdfIn PDF document text
    • http://goldmustang.com/files/files/vesejagofuvurenupezoke.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/29468158689.pdfIn PDF document text
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/12026877775.pdfIn PDF document text
    • https://novamakine.com/upload/ckfinder/files/98962611699.pdfIn PDF document text
    • http://mycoapaisyl.com/webimages/files/lepefusobomozumusi.pdfIn PDF document text
    • http://dieterheich.de/images/uploads/file/36690772399.pdfIn PDF document text
    • http://ohxto.com/uploaded_files/userfiles/files/vivazugofov.pdfIn PDF document text
    • http://palirna-frydek.cz/uploaded/file/rufurizizukujuzimapejudet.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_off0000d724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD724 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3B 10248 bytes
SHA-256: 2ec89dcfd786ffda43fd45aaa4e8fb2fc4e553d0c1ca93f64348112a268779c1
font_02_sfnt_off00010641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10641 18252 bytes
SHA-256: 39f8191165b0aff7b8ecb8935a97d8a375b0d9d8c4074be2707b6dbcb8f977d8