Malicious PDF — malware analysis report

Static analysis result for SHA-256 08ed96c64a9f5cda…

MALICIOUS

PDF

70.5 KB Created: 2021-10-01 03:19:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 02b1cc14268ddeae5352b08471701f26 SHA-1: 4ad6696ea0706fad9de33de6508d7414d7d9c066 SHA-256: 08ed96c64a9f5cdafa6ffce099c3009ee5fb6238ac108e67a233cc83aa2d8d5f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for malware distribution or phishing. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://inwebjor.ru/uplcv?utm_term=money+heist+season+1+english+subtitles PDF link annotation
    • https://heyratacademy.ir/file/tanabelarudodepe.pdfIn PDF document text
    • http://shimamura-mail-order.com/userfiles/file/12150315878.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615639c863624---73825822954.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/97785526800.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/28074198198.pdfIn PDF document text
    • http://goldenagegroup.vip/userfiles/file/letuxiru.pdfIn PDF document text
    • https://giorgiosantinelli.it/file/20594280813.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/76666938272.pdfIn PDF document text
    • https://jasmijnbloemengroen.nl/userfiles/file/57758687333.pdfIn PDF document text
    • http://matraholding.hu/images/userfiles/files/95914195532.pdfIn PDF document text
    • https://noble-program.site/js/ckfinder/userfiles/files/4987229273.pdfIn PDF document text
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/kopewutatozamafo.pdfIn PDF document text
    • http://express-service-auto.fr/ckeditor/ckfinder/userfiles/files/32511769418.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/nekidisijamok.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/74524088819.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/wozazifisala.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1615629d91c429---32549951516.pdfIn PDF document text
    • http://dentish.ru/ckfinder/userfiles/files/mowiriverenonu.pdfIn PDF document text
    • http://samtekelektrik.com/files/vujizoduzutig.pdfIn PDF document text
    • http://rayanchem.com/d/files/31229494574.pdfIn PDF document text
    • https://nabil-doukali.com/userfiles/file/34900829845.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_off0000b152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB152 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC969 10684 bytes
SHA-256: 2650002a923b3527b2ecf5d962d415fc94fd8a20b8539f161a6d586ff1e7775e
font_02_sfnt_off0000e1f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F6 16748 bytes
SHA-256: 1f44f57bba8d3743e8b3692f68d92690e97b4962d37a285ac10169974806857c

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