Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa20d644a58026f5…

MALICIOUS

PDF

85.8 KB Created: 2021-09-11 05:04:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: cfe79c21a7e59021e6af67364d024fb3 SHA-1: 8e709e7d806b0affc695144fe5bcc4b8e5d389bd SHA-256: fa20d644a58026f57fc6ccca09242e2d8fbe11f3d5f61bbf3f7312d511171a96
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://allytemp.ru/uplcv?utm_term=makestyles+in+react+class PDF link annotation
    • https://quasar.mago.ro/ckfinder/userfiles/files/5733444696.pdfIn PDF document text
    • https://paulogomeslda.com/userfiles/file/9965526760.pdfIn PDF document text
    • https://dcmheavyequipment.com/admin/images/file/39073186249.pdfIn PDF document text
    • http://ge-mak.com/files/xenomanuxodavuvud.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/50795594822.pdfIn PDF document text
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/99747871639.pdfIn PDF document text
    • https://interior-mark.com/ckfinder/userfiles/files/furageze.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/ziwapuja.pdfIn PDF document text
    • https://mlbcsimleague.com/ckfinder/userfiles/files/88387015450.pdfIn PDF document text
    • https://tskrea.com/userfiles/file/vokeriwug.pdfIn PDF document text
    • http://ecilingirler.com/resimler/files/pitigefoli.pdfIn PDF document text
    • http://www.tiendadelbordado.com/ckfinder/userfiles/files/88898243379.pdfIn PDF document text
    • http://studiopedrazzini.eu/userfiles/files/faligenimoxuwesana.pdfIn PDF document text
    • http://csc025.com/userfiles/file/20210907051312_eze5gp.pdfIn PDF document text
    • http://xinchenfast.com/upload/file/kuzipawuzunujekinesi.pdfIn PDF document text
    • https://www.totspotdaynursery.co.uk/ckfinder/userfiles/files/gagigelobopilu.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/67022143408.pdfIn PDF document text
    • https://tybistanbul.org/resimler/files/mujibeja.pdfIn PDF document text
    • http://www.bandungmesin.com/file/buwoso.pdfIn PDF document text
    • https://pasarangroup2.com/contents/files/manozakonojabipokozefexan.pdfIn PDF document text
    • http://www.cerathai.com/image/upload/File/57000831579.pdfIn PDF document text
    • https://rtvpuls.com/ckfinder/userfiles/files/tipidirije.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/24867341673.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/470958c6ea73b900f31a732e37b565b1/fikapuzalunusu.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_off0000e4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D8 10304 bytes
SHA-256: f48d11e863890b9bba55586e5c150232f4f27b6fd4e32ac68227240b1bb43592
font_01_sfnt_off0000fc38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001144a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144A 20312 bytes
SHA-256: ab916902deb9b56ffba9efbc0b209903d8cbc61ca84a087c4f7e7ecf88467257

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