Malicious PDF — malware analysis report

Static analysis result for SHA-256 65f9747e185d68e1…

MALICIOUS

PDF

73.1 KB Created: 2021-09-21 10:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f66179d6d06570ebe9f22fa14d0c3f98 SHA-1: dcf07316f51e0433b3640f00fab5e8e69249da89 SHA-256: 65f9747e185d68e12e87c8869158bba945cb74b1d1a996957719ffaea2f72fbd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are structured as link farms on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://pixomot.ru/uplcv?utm_term=apkproject+com+snack+video PDF link annotation
    • https://ezsprinting.com/userfiles/file/56691014043.pdfIn PDF document text
    • http://ylphs.com/ckfinder/userfiles/files/lojisevuwem.pdfIn PDF document text
    • https://bnbtravels.com/ckfinder/userfiles/files/6930422177.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/suzotorepokuzefowiwif.pdfIn PDF document text
    • http://zenithmetals.com/files/xavovosedub.pdfIn PDF document text
    • http://beccaro.it/userfiles/files/54891897234.pdfIn PDF document text
    • http://fairbank-ia.org/admin/ckfinder/userfiles/files/mevefanafebetusatijef.pdfIn PDF document text
    • https://indiantiffin4me.com/nbloom/fckuploads/file/26028787800.pdfIn PDF document text
    • http://theaterbuehne-schwandorf.de/userfiles/file/60237993296.pdfIn PDF document text
    • https://www.sterlingsez.com/ckfinder/userfiles/files/25376280444.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16143ecc8487f0---26557527993.pdfIn PDF document text
    • https://securitydm.eu/slicice/file/49711599814.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/32192868271.pdfIn PDF document text
    • http://shopgraeagle.com/ckeditor/uploads/files/zutovufinofasubela.pdfIn PDF document text
    • http://astorandblack.net/emailer/userfiles/file/xujodijaxibavigeroxufirij.pdfIn PDF document text
    • https://www.colline-eternelle.com/ckfinder/userfiles/files/13179123488.pdfIn PDF document text
    • https://kibledergisi.net/resimler/files/posefumidonunawavedubu.pdfIn PDF document text
    • http://ntvietnga.com/upload/files/31223226996.pdfIn PDF document text
    • https://lrsdev.com/userfiles/file/9963767085.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202109051153430483.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136a22651598---21123473654.pdfIn PDF document text
    • http://mskabel.cz/UserFiles/File/60909986683.pdfIn PDF document text
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/42207239272.pdfIn PDF document text
    • http://sov.tranovice.org/webpagebuilder/ckfinder/userfiles/files/22742139558.pdfIn PDF document text
    • https://profitaler.com/UserFiles/file/7776950944.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_off0000bcb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCB3 16192 bytes
SHA-256: bea5808450feb7ede4efbe4ecb9bd5016eb518f92738be0f2b34996b9dd72db4
font_01_sfnt_off0000e5c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C5 10900 bytes
SHA-256: be4ae3643de80999ca0271ee906aa466c0b6f8d7af165eb66459de2e77e43434
font_02_sfnt_off0000ff10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1