Malicious PDF — malware analysis report

Static analysis result for SHA-256 7009492800016a88…

MALICIOUS

PDF

71.9 KB Created: 2021-09-14 00:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1fe2aad7736aa1e08eb51688986e2285 SHA-1: bed8e5baa6e78e4f61765a89c51e2f46a7bf2029 SHA-256: 7009492800016a88f9633eaf7e28ccd3fe27aac68de48179ae0fc77d6f6ad8ab
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URIs, many of which point to disposable domains and are likely used for phishing or to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://philabc.ru/uplcv?utm_term=gta+ctw+android+mods PDF link annotation
    • http://alrabbancapital.com/file/files/44522402214.pdfIn PDF document text
    • https://loctra.net/userfiles/file/bodijalosufe.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/89729474621.pdfIn PDF document text
    • http://pcccmiennam.com/media/ftp/file/mejodopisaxukufez.pdfIn PDF document text
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gozogon.pdfIn PDF document text
    • http://fqcycpa.com/jingkelun/userfiles/files/20210910210245.pdfIn PDF document text
    • https://www.autopsrus.com/ckfinder/userfiles/files/fajamovabefofogozuzup.pdfIn PDF document text
    • https://7mark3t2-7aya.com/contents/files/44506286450.pdfIn PDF document text
    • http://honmamon-s.com/img_seminar/userfiles/file/77684145825.pdfIn PDF document text
    • https://il-gusto.com/images/file/susaxujulubud.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/nudixenobiliviverufeviba.pdfIn PDF document text
    • http://chiaranannini.com/userfiles/files/ravufunexumonimedewoxurep.pdfIn PDF document text
    • https://komunalno-vrgorac.hr/files/89621168185.pdfIn PDF document text
    • http://hotelalbicia.com/userfiles/file/rinemanusolalifi.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/mitazevidagilibewikuvara.pdfIn PDF document text
    • https://avela.md/userfiles/file/nimojozajuvowowo.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a6d4df13e2---98034788224.pdfIn PDF document text
    • http://naturestuff.nl/siteimages/file/56360480964.pdfIn PDF document text
    • https://christianklein.eu/Quansis/ckfinder/userfiles/files/67262385401.pdfIn PDF document text
    • http://pop-around.com/file_media/file_image/file/kutegafabuv.pdfIn PDF document text
    • http://dreiseengrundschule.de/files/95314737692.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/35025127.pdfIn PDF document text
    • https://33mobility.net/uploads/files/26182781825.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_off0000b7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7FE 10480 bytes
SHA-256: 1c29323ead620d393b571ac15970b2efe0692b8ec4b5e5b5c12dd3715652928e
font_01_sfnt_off0000cfe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F5 16656 bytes
SHA-256: 5ef831034b08d4226c4931bb5943e28dac44b26e11f7a0e9900813af3409b411

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