Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f42d7cf4f3fcd0…

MALICIOUS

PDF

76.3 KB Created: 2021-09-14 11:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 13801e23129b7de599de293e760cda7b SHA-1: 28077ed007a367e0b54a7db94f7a5c927ef4361c SHA-256: 47f42d7cf4f3fcd029b74532bd344790a2f3577d230ef962af1b5fd68ac1f3ce
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 and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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.
  • 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 http://oppedisanorobertosrl.com/userfiles/files/53156229670.pdf In PDF document text
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/viwexovizurejis.pdfIn PDF document text
    • http://richardchong.com/userfiles/files/watavimufuvomegutusap.pdfIn PDF document text
    • https://www.bbmnetlicitacoes.com.br/cms/ckfinder/upload/files/fitilakiletujijan.pdfIn PDF document text
    • http://mdtrend.hu/files/file/42335628111.pdfIn PDF document text
    • http://hamishehbaharcarpet.com/My_Project/Hamishe_bahar/ahar_img/files/18169203349.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4c7cbb3b8---luzedede.pdfIn PDF document text
    • http://koala-al.com/d/files/97057600887.pdfIn PDF document text
    • http://tencanpowder.com/d/files/nenuxagadozezubisimo.pdfIn PDF document text
    • http://www.moyekolodin.com/files/zisomerovepawokumodevavem.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/23283830953.pdfIn PDF document text
    • http://lse.hu/userfiles/file/purijolalorililopudidepo.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/9725147992.pdfIn PDF document text
    • https://fier-forjat-valimet.ro/ckfinder/userfiles/files/83678376903.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/rimepavotoxebusojudiw.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/puwatuxisedukivigu.pdfIn PDF document text
    • http://xn--12cfu9bc1efac9a9azfdsb7b9d1f0j.net/ckfinder/userfiles/files/52256091305.pdfIn PDF document text
    • http://tyros-club.de/userfiles/file/vomiwo.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/fawofedaxeluvosa.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/47306598040.pdfIn PDF document text
    • https://rajaunited.com/contents/files/54182825081.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/37966631878.pdfIn PDF document text
    • http://demkapi.com/resimler/files/pazetimawopateveg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=cadillacs+and+dinosaurs+modPDF link annotation
    • 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_off0000c602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC602 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000de14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE14 17872 bytes
SHA-256: 64fdcb25ad3eb2b2ae1bced96fcff672fdf9594170d6438a847a0362ecd270c9
font_02_sfnt_off00010c89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C89 10432 bytes
SHA-256: 2977e5a290fcb7ad11ff9c9f7b0f83f6bf4135bf4a1abe591c710abebde34cee

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