Malicious PDF — malware analysis report

Static analysis result for SHA-256 445966f40ed809fa…

MALICIOUS

PDF

76.9 KB Created: 2021-10-13 07:21:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-11
MD5: e7d62c889bcb8bbc72031e9b41342f1e SHA-1: cbf0514abcf69ef3d81909fd6c32e0caf4ddd886 SHA-256: 445966f40ed809fa2359dc92c4e73faf7be4ae8e782ff4e1d16723c31d523f3c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a large number of links pointing to various domains, suggesting a link farm designed to obscure the ultimate destination or spread malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, reinforcing the assessment of its harmful intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://brazilairporttransfers.com/ckfinder/userfiles/files/57436500552.pdf In PDF document text
    • https://madame-tina.com/ckfinder/userfiles/files/34637243100.pdfIn PDF document text
    • http://ingegnasrl.com/userfiles/files/ginalese.pdfIn PDF document text
    • https://i-chat.tw/js/ckfinder/userfiles/files/dipuzoga.pdfIn PDF document text
    • http://op-gold.com/ck_image/files/kovusorajesevorererelix.pdfIn PDF document text
    • http://automyjka.pl/automyjka.pl/userfiles/file/nugudefimowogedamum.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/semorusibebimuvijag.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/jaxinu.pdfIn PDF document text
    • https://www.savininkai.lt/ckfinder/userfiles/files/63337420422.pdfIn PDF document text
    • http://gaudi.tw/upload/file/kanosajefamegove.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/godubipuwimepefusoze.pdfIn PDF document text
    • https://24emk.ru/ckfinder/userfiles/files/41073723696.pdfIn PDF document text
    • http://bora.su/ckfinder/userfiles/files/77452312101.pdfIn PDF document text
    • http://hfengly.dk/skoleportalen/userfiles/file/53890485975.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/53061467039.pdfIn PDF document text
    • http://zaiger.ru/img/file/gotusabamuxikuresadamuze.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/fujevugodabug.pdfIn PDF document text
    • http://etoprosto.ru/ckfinder/userfiles/files/61400667178.pdfIn PDF document text
    • http://live-net.it/file/38911438477.pdfIn PDF document text
    • http://greensketch.in/userfiles/file/99901042667.pdfIn PDF document text
    • https://dm288.rs/slicice/file/memaxifeleti.pdfIn PDF document text
    • http://kazuma.ru/ckfinder/userfiles/files/51310400321.pdfIn PDF document text
    • https://ita.kru.ac.th/ckfinder/userfiles/files/93965581996.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/mizokajopa.pdfIn PDF document text
    • http://biosurfest.com/userfiles/files/3708764451.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/HTGXzuRVGb4/uplcv?utm_term=small+town+girlPDF 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_off0000c36a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC36A 10312 bytes
SHA-256: 08cb772233e3c99aaf192fd88566c0a8bab98034a449bb427a061c077bfdc3aa
font_01_sfnt_off0000daa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA3 19984 bytes
SHA-256: 4cbffbf7a15ca4ae1d635ac4e4240f266b8de581b10a55c59b4f58db08bcf547
font_02_sfnt_off00010e98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1