Malicious PDF — malware analysis report

Static analysis result for SHA-256 63067e01113909b8…

MALICIOUS

PDF

83.2 KB Created: 2021-09-13 07:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cbdae168b6a61a237df669f6c9ebf76f SHA-1: f3f92e7f6ebaedd2c8c53b8c26bea6f60016ab8f SHA-256: 63067e01113909b87d8951c3e2d3e0bc6e71518a4542b217f8d1d5134f9ec4d8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting a tactic to obscure the ultimate malicious destination. The presence of external URIs and the overall structure strongly suggest an attempt to redirect users to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=harry+potter+pc+game+download PDF link annotation
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a753e3838f---sozirupen.pdfIn PDF document text
    • https://searchlink.org/userfiles/file/zasuriviwesijodutidununu.pdfIn PDF document text
    • http://foxgraphics.paulsfashion.in/files/72300136799.pdfIn PDF document text
    • https://helicopterleasingservices.com/userfiles/files/dimedagun.pdfIn PDF document text
    • https://okazionche.com/files/26785040343.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/15429633816.pdfIn PDF document text
    • http://oprandi.it/userfiles/files/vuzogevokojalimedetelinud.pdfIn PDF document text
    • https://zzhqhi.com/d/files/28440508727.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/161317b7f25767---jilukutelu.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/65270192194.pdfIn PDF document text
    • http://www.hzkontejnery.cz/ckfinder/userfiles/files/52959028308.pdfIn PDF document text
    • https://pgp-puh.hr/fck_media/file/18863816896.pdfIn PDF document text
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/89485651712.pdfIn PDF document text
    • https://bfull.ru/uploads/files/viriv.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/dowuzabozuborubopixepimid.pdfIn PDF document text
    • https://efficientinfocomm.com/ckfinder/userfiles/files/refukudi.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/vowegirujebabojik.pdfIn PDF document text
    • http://esenkardeslerinsaat.com/resimlerfiles/fegabakama.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/76635858091.pdfIn PDF document text
    • https://85097781.com/upload/files/7432295037.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/gapuzuvorex.pdfIn PDF document text
    • http://gldbirdgel.com/user_img/files/wodon.pdfIn PDF document text
    • https://csodamalom.hu/files/files/59989443710.pdfIn PDF document text
    • http://lpxs168.com/filespath/files/20210902075823.pdfIn PDF document text
    • https://agermag.ro/mm/file/linekonada.pdfIn PDF document text
    • http://phanmemerp.vn/attachment/files/66036611417.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_off0000e0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CD 10788 bytes
SHA-256: f9587729d1c6e9a13b6db0364e6399b1668563ab3d7988f86832533e94886e94
font_02_sfnt_off00011173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11173 17344 bytes
SHA-256: 4315c53aeccfac6c4af014b875b6ab4e51b708e10399ea49e95dec83f72c4d3e

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