Malicious PDF — malware analysis report

Static analysis result for SHA-256 67008c918f7cffbb…

MALICIOUS

PDF

83.8 KB Created: 2021-09-17 04:30:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4c1248e8ed2f9a380883dd5e57a9d5ad SHA-1: b78358e9b4bbdfa65e8013efccac8f48c83286b5 SHA-256: 67008c918f7cffbb1cb3069f59cfb8c611e92c03b59ae787c2a76fa1ca14c9d3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm on disposable hosting, with numerous embedded URLs pointing to potentially malicious content. The PDF structure and embedded links suggest an attempt to redirect users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://bakefruit.com/uploads/files/202109070913409270.pdf In PDF document text
    • http://ladyvenus.it/userfiles/files/bazetu.pdfIn PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/bozofija.pdfIn PDF document text
    • https://debo-fit.be/userfiles/file///51649627003.pdfIn PDF document text
    • http://joinsocialbubble.com/cake/beta/userfiles/file/77942020878.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/memiwitefomojemufeloxu.pdfIn PDF document text
    • http://twilaw.com/files/files/33597907507.pdfIn PDF document text
    • http://odontotecnicacoop.it/userfiles/file/20765059339.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/nikepatifate.pdfIn PDF document text
    • https://zlatartopalovic.rs/files/rizikefatubu.pdfIn PDF document text
    • https://smgbid.com/ckfinder_userfiles/files/tonerojapopedow.pdfIn PDF document text
    • https://calienglish.com/ckfinder/images_store/files/67999352862.pdfIn PDF document text
    • http://worshipedia.mobi/sites/default/files/file/jekanasazom.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/20559879410.pdfIn PDF document text
    • https://elmawadah.com/userfiles/file/nubagog.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/82926243278.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021090516442511.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/wezovisivujilogir.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/57871111574.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16138e4cba1318---60971407623.pdfIn PDF document text
    • http://mayjack.com/upload/files/20578999239.pdfIn PDF document text
    • http://ceroki.com/image/files/wasuzepitonojalofude.pdfIn PDF document text
    • https://www.xyoaa.org/sites/default/files/files/lowifuvogepevoxipirijugo.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/54692606830.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/86918428337.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=www+live+cricket+video+online+comPDF 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_off0000e111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE111 10440 bytes
SHA-256: 673e7d5ec86cb6ef9537de85bc999ed220a7444a9548ed4718d3ed52112b2bee
font_01_sfnt_off0000f8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B4 18876 bytes
SHA-256: 1f8ebbf47c094fbe34c886ac2152a87c975e4c087a91579d834766afaa7822ec
font_02_sfnt_off00012988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12988 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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