Malicious PDF — malware analysis report

Static analysis result for SHA-256 70702ecc2db2da94…

MALICIOUS

PDF

78.1 KB Created: 2021-09-13 04:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0ef55eace32427f0daa6f1ff738a7afb SHA-1: b6535f7e9a632117a7753053c39e2291211af357 SHA-256: 70702ecc2db2da9484e82086cd2126667476f71b7c46c2d4072396e2320606df
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://historia-bfured.hu/userfiles/file/roredavodezutad.pdf In PDF document text
    • http://synhbio.com/upload/files/52009891127.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/rekufafuxumikel.pdfIn PDF document text
    • http://land89.com/ckupload/files/86796961909.pdfIn PDF document text
    • https://lmbri.com/WYSIWYGImage/file/timutotetor.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/rexasanewap.pdfIn PDF document text
    • http://zjleiou.com/images/upload/File/lagogefexufakel.pdfIn PDF document text
    • http://rtm-plus.com/ckfinder/userfiles/files/mifozavimevawesivowefude.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/21288178415.pdfIn PDF document text
    • http://skrn.cz/pic/file/52954255101.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/92689385488.pdfIn PDF document text
    • https://vicareyou.com/userfiles/file/95057471941.pdfIn PDF document text
    • http://01host.ru/userfiles/files/tanumifosukukutulezuziwo.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/vumesirobuwab.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/6c105fc7bec6b90869da94b131d84bf6/85023123676.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/27400886179.pdfIn PDF document text
    • http://keralastatetailorsassociation.com/userfiles/file/dazidagugijazixuxugivage.pdfIn PDF document text
    • http://ibarugi.com/fckeditor/userfiles/file/juxeresomi.pdfIn PDF document text
    • https://curvy.tw/upload/files/zawonoxijefefuborulesoxux.pdfIn PDF document text
    • http://idominjazz.com/fckeditor/userfiles/image/vororajiramejirolig.pdfIn PDF document text
    • https://netron.pt/app/webroot/media/files/sekonofuga.pdfIn PDF document text
    • http://loadcell.vn/Images_upload/files/22871470920.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/vivunupumodevitedejatap.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/rulalurif.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16139ff246e3ed---71407118995.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=android+custom+ratingbar+githubPDF 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_off0000cb00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB00 18100 bytes
SHA-256: 88bd48479e9f00649aecfa423ac7068f474f658b1292dbe2959f8c5b65ff6e54
font_01_sfnt_off0000fa51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA51 10860 bytes
SHA-256: a21eaa3e71569cbdfbcf4004071244a4c2beaa168085f88d0f5ed7ea26952d9e
font_02_sfnt_off00011303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11303 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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