Malicious PDF — malware analysis report

Static analysis result for SHA-256 565bbe6b2b2e84a2…

MALICIOUS

PDF

76.4 KB Created: 2021-09-13 10:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 40c3cb770d89015b351a1d4d4e9e8e79 SHA-1: 80ba2a4f7f8c351680b31e6fef40f74b8c4a5e27 SHA-256: 565bbe6b2b2e84a27cd9563d91130685d0dbac1cc39bf8e08429773e134baf82
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, indicating a strong intent to redirect users to malicious content. The document body is heavily obfuscated, but the presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://inwebjor.ru/uplcv?utm_term=barbie+magical+fashion+game+to+play PDF link annotation
    • https://charterboatdeliverance.com/uploads/files/15205711279.pdfIn PDF document text
    • http://teedinmaesai.com/user_img/file/15280786624.pdfIn PDF document text
    • http://himalayakebab.irafbrothers.com/shipinc/userfiles/files/43879770897.pdfIn PDF document text
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ronejujikedububudeturor.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/lonanesixokukagegifenom.pdfIn PDF document text
    • https://gestcargo.com/uploadfiles/file/38650603248.pdfIn PDF document text
    • http://chia4kids.ru/ckfinder/userfiles/files/7042724193.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/44110505601.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/76684134499.pdfIn PDF document text
    • http://drsuthichai.com/userfiles/files/7659853805.pdfIn PDF document text
    • http://tlumacz-francuskiego.pl/userfiles/file/dasewojud.pdfIn PDF document text
    • https://tidurmalam2.com/contents/files/tutizemozadiwuges.pdfIn PDF document text
    • https://www.idd.no/ckfinder/userfiles/files/9837256833.pdfIn PDF document text
    • http://baiduvpn.com/upload/files/xibop.pdfIn PDF document text
    • http://7profi.net/userfiles/file/jolibodesulejojisosufi.pdfIn PDF document text
    • http://etkenkalip.com/files/tewax.pdfIn PDF document text
    • https://ibliberia.com/ckfinder/userfiles/files/dugukav.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/76d57fc4dc798cc5714be601008d8f21/titejudokemola.pdfIn PDF document text
    • http://hawaiisushi.iorderfoods.com/uploads/files/buzikulijaxewive.pdfIn PDF document text
    • http://fine-trading-knotwork.com/uploads/media/93926995072.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/sugadopudokode.pdfIn PDF document text
    • http://hastensandbreakfast.nl/userfiles/file/lijanelofiwokusupivurubi.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24930852618.pdfIn PDF document text
    • http://test-immo.com/file/62837404120.pdfIn PDF document text
    • http://mdfgiare.com/upload/files/84656736644.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_off0000c601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC601 16780 bytes
SHA-256: 7fbfb1b4df776151db3379c8e67cd7cb7ed4e398076572d2c9a4d2109f2ef470
font_01_sfnt_off0000f113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF113 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001092a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092A 11236 bytes
SHA-256: c9a0e86e67358f4b06f3799010222a0a770f5df0dadc17d89960db17b77a9a3f