Malicious PDF — malware analysis report

Static analysis result for SHA-256 11651502563367a9…

MALICIOUS

PDF

86.7 KB Created: 2021-09-17 17:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9bb6ead7e62311baee2a281e7b96e5fa SHA-1: 317b15c6271ee647b6d4fc906f3ad5da70a5183d SHA-256: 11651502563367a9ea6177cd28539c61b7533e88c61dde3700f02d48ea62dd1d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://gewald.ru/content/Files/3321289284.pdf In PDF document text
    • https://pt2-turbo-j3t.com/contents/files/komamenidulavefozuzor.pdfIn PDF document text
    • https://phnews.ro/files/file/93130735327.pdfIn PDF document text
    • http://shopsuathientu.com/uploads/userfiles/file/sazomakosimiwoxuzezuwul.pdfIn PDF document text
    • http://gekon.net/userfiles/file/jusejabe.pdfIn PDF document text
    • http://www.lasallelille.com/admin/ckfinder/userfiles/files/95565570196.pdfIn PDF document text
    • http://soloparamideco.com/js/new/fckeditor/userfiles/file/nitoferakazemipubak.pdfIn PDF document text
    • https://kindeeyudee.com/ck_files/files/dosidevetiwogifugegex.pdfIn PDF document text
    • https://digitaluzaktanegitim.com/calisma2/files/uploads/82913109437.pdfIn PDF document text
    • http://arsvet.ru/img/upload/kazogumemu.pdfIn PDF document text
    • http://umbabox.com/userfiles/file/50671600084.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/dujibekujekufo.pdfIn PDF document text
    • http://khangvietdn.com/uploads/file/pokiwoburilixivusijofi.pdfIn PDF document text
    • http://surestegc.org/documentos/file/16662614700.pdfIn PDF document text
    • https://majubesar.net/contents/files/29063735223.pdfIn PDF document text
    • http://mtt-association.fr/upload/file/dilezi.pdfIn PDF document text
    • https://impactmediaresources.com/userfiles/file/vugan.pdfIn PDF document text
    • https://edarky.net/data/file/rozazomudosojifazi.pdfIn PDF document text
    • http://ablerexthailand.com/userfiles/files/wudugopa.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb2e2efb75---66921721063.pdfIn PDF document text
    • http://hypotekaprezamestnancov.sk/res/file/56967616135.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140803c83aaf---71780784900.pdfIn PDF document text
    • https://thingstodobahrain.net/ckfinder/userfiles/files/xelonuwepovapativupa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=surface+pro+6+vs+surface+laptop+2PDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E5 19056 bytes
SHA-256: 00ad23ceaeeae2c1e77053f0afe3d584f27050445c50e9e83aa209e220882549
font_01_sfnt_off00011a65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001327c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1327C 10804 bytes
SHA-256: a654cfcf816cbe7d7e12d65210b489ed504c0cb3e3df77c6bb5792dc5d420d0d

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