Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb67299f215722d0…

MALICIOUS

PDF

84.9 KB Created: 2021-09-10 12:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c8c5b392d60d82c5b0b210e76245f1eb SHA-1: a2c619cb14a8bcd01de6e421f40fd14d7a6eb1d9 SHA-256: eb67299f215722d076fd43df77bfa505ae2debe498d57e1ad558900e2e520432
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with high confidence. It contains numerous external URIs and is flagged as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://huntic.ru/uplcv?utm_term=the+complete+adventures+of+charlie+and+mr+willy+wonka+pdf PDF link annotation
    • http://fvv-hohenfelde.de/sites/default/files/files/tudefixaxewosej.pdfIn PDF document text
    • http://goldcoil.com/uploadfiles/files/51192253622.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/sekasut.pdfIn PDF document text
    • http://7profi.net/userfiles/file/xetanonojamigesijapukinet.pdfIn PDF document text
    • http://archidaldegan.eu/userfiles/files/poxavafevasete.pdfIn PDF document text
    • https://bocrangsuthammy.vn/upload/files/17677256013.pdfIn PDF document text
    • http://preiswerte-unterkunft-papenburg.de/mediapool/66695577093.pdfIn PDF document text
    • http://satunatc.ac.th/ckfinder/userfiles/files/17064043992.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/vilal.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/93340258822.pdfIn PDF document text
    • http://buddhavehicle.com/userfiles/file/tuxorivi.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/98108573230.pdfIn PDF document text
    • http://tsnpharma.com/upload/files/ferudinetubepa.pdfIn PDF document text
    • http://ksklinika.ru/ckfinder/userfiles/files/mikowu.pdfIn PDF document text
    • http://max-metal.pl/gfx/file/sekenigebitoxig.pdfIn PDF document text
    • https://megashina24.ru/files/files/58585990293.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/lezirikivexinejedijevizi.pdfIn PDF document text
    • https://felicitareonline.ro/ckfinder/userfiles/files/maronupunagidonitebakapi.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/20166185938.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/23113444259.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613719df0d98b---67976545148.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/48506393151.pdfIn PDF document text
    • http://floridare.ru/app/webroot/img/uploads/file/045912_bebosaminemedomugog.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_off0000e058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE058 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86F 11304 bytes
SHA-256: f63f892c972c90377d84f779cb17e8e03e1101e6e5c49bfb1cb7b26c4681c407
font_02_sfnt_off000112e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E6 19228 bytes
SHA-256: 69caebe64dd1b2984f30d2a2aca9c010730713d4e70c83801ccb146ae0a3fab2

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