Malicious PDF — malware analysis report

Static analysis result for SHA-256 9878596108748111…

MALICIOUS

PDF

88.5 KB Created: 2021-10-05 08:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 923d5b42dc1de65aae5c8aa810ffdd18 SHA-1: 9ff118d676680b8007a58e3154f8f883b2c23ca4 SHA-256: 987859610874811182ee2567d2ed933dd4c217bde2a15e7092945ac4e33cf421
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/pasodume.pdf In PDF document text
    • http://weiken-rc.com/upload/files/furojozewemuripo.pdfIn PDF document text
    • https://taumed.kz/upload/2021/09files/210924154734537332pmja7.pdfIn PDF document text
    • http://opt-russtd.ru/data_center/upload_pictures/file/82942943786.pdfIn PDF document text
    • http://capital96.com/userfiles/file/58321911981.pdfIn PDF document text
    • https://www.jdconstinc.com/ckfinder/userfiles/files/92249444961.pdfIn PDF document text
    • http://abdon.madteam.net/ckfinder/userfiles/files/9328949100.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///20210916204720_259125980.pdfIn PDF document text
    • http://lovesenergy.nl/file/88879262768.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/sanefasodiged.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/54678422418.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/161525ed1ba6c7---gufezafixisowawoxubunusin.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/b512b0508a83113026db3fc241f172f5/31492827886.pdfIn PDF document text
    • https://paroles-vives.com/ckfinder/userfiles/files/butasibikoj.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/69612074376.pdfIn PDF document text
    • https://ever-progress.dacola.com/upload/files/5579715779.pdfIn PDF document text
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/36533356706.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/masimimu.pdfIn PDF document text
    • http://sasnowosielski.com/ckfinder/userfiles/files/mesasojidufisebojomekotez.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/bemetavuruluzikovefim.pdfIn PDF document text
    • http://makeyourpartnermelt.com/userfiles/file/21291297188.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/kavikubavomabax.pdfIn PDF document text
    • https://danielfelber.ch/userfiles/file/xabatotorik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=one+piece+movies+dubbed+listPDF 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_off0000edc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC1 10744 bytes
SHA-256: 2d852789af421b5fe2755ee7ec4a4dff244d1a2f62e0d855c74abc69cb21133d
font_01_sfnt_off00010641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10641 20072 bytes
SHA-256: b91e3a2bf101bcb18f194c9c57bb63e8cff931b2a1b0ebb0da7bcf603a8ed62d
font_02_sfnt_off00013af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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