Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba5ee8e4a4c10578…

MALICIOUS

PDF

82.5 KB Created: 2021-09-09 08:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 270eab771960c93b43df58b89d48350e SHA-1: 9d7ff7400a7a9bce7b7bf135132090770ef5acf7 SHA-256: ba5ee8e4a4c105782ffcc78fc31d5f24d342cf86d932fd0df076aedf06447f24
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to a link farm hosted on disposable domains, a common tactic for phishing or scam operations. The presence of a link farm suggests an attempt to obscure the ultimate destination and potentially evade detection.

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 http://ventss.ru/userfiles/files/dikolave.pdf In PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210905095841.pdfIn PDF document text
    • http://dj-maily.com/uploads/pages/files/tafet.pdfIn PDF document text
    • http://l-max.ru/userfiles/file/81961310588.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613402d710898---wubemel.pdfIn PDF document text
    • https://ebooksweb.net/files/file/71967179171.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/soxudakebudowujikugeza.pdfIn PDF document text
    • http://cuacuonbinhduong.com/upload/files/48788761270.pdfIn PDF document text
    • https://pannonfinanz.eu/editor_up/98911723295.pdfIn PDF document text
    • https://www.opsclown.it/ckfinder/userfiles/files/poxokaxotabewawesev.pdfIn PDF document text
    • http://yongqingtech.com/d/files/83443352155.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/66494761660.pdfIn PDF document text
    • https://mackbeks.com/files/file/pifurowufijokizufexexux.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/lotanudosejisa.pdfIn PDF document text
    • http://envigest.cz/upload/file/xawon.pdfIn PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sifurazukuxozo.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/69267856227.pdfIn PDF document text
    • https://yp05.com/_UploadFile/Images/file/40340002221.pdfIn PDF document text
    • http://dd-eng.com/files/files/1937859645.pdfIn PDF document text
    • https://waxparadise.pl/userfiles/file/tilaxotutamipusezizebux.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612fefc769136---vutazesenenujesosegex.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/24501421393.pdfIn PDF document text
    • https://ringid.vn/ckfinder/userfiles/files/47139045124.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+send+files+from+ipad+to+androidPDF 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_off0000dd0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51F 17852 bytes
SHA-256: 7590dd8aa006ea893f855b90aa4b2c79df6720970182266ef225ac95429114db
font_02_sfnt_off00012361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12361 10736 bytes
SHA-256: 6f9703829c44871812d3587c19c4c0bd7cace3cf87574ce46f19a9e249c0661e

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