Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ebee53970f0718b…

MALICIOUS

PDF

75.2 KB Created: 2021-09-11 11:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0e63639042650471c187d7e27a6e6bae SHA-1: 4685c1660999d6fe0e11ca41a2a1a9ca76fba3d6 SHA-256: 8ebee53970f0718b4c582a5880edf403268fef270563030c5959ec56e27aadcf
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating embedded JavaScript and a link farm structure. The numerous external URIs, including one with a 'pokemon go hack' query, suggest a phishing or malware distribution lure. The embedded JavaScript likely facilitates the execution of malicious actions or redirection to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://cructi.ru/uplcv?utm_term=pokemon+go+hack+usa+union+square+download PDF link annotation
    • https://dm288.com/slicice/file/guwutodivasugoxixe.pdfIn PDF document text
    • http://kingtonkatsu.com/uploads/files/xekedawas.pdfIn PDF document text
    • https://bepcongnghiepphuchung.vn/userfiles/file/fopenorubokelanesiwamujo.pdfIn PDF document text
    • http://langmoon.jp/js/upload/files/fevabot.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/dixiwuga.pdfIn PDF document text
    • https://kabelkyaobuv.sk/editor_uploads/files/kowifimuvijazewukes.pdfIn PDF document text
    • http://marienoellebermond.com/img/uploaded/file/kugunome.pdfIn PDF document text
    • http://kingcraftviet.com/uploads/ckfinder/files/70164537422.pdfIn PDF document text
    • https://batdongsandothanh.vn/luutru/files/98814534166.pdfIn PDF document text
    • https://cliniquemyo.com/userfiles/file/kafidevigumik.pdfIn PDF document text
    • http://bielle-srl.com/userfiles/files/98225823342.pdfIn PDF document text
    • https://swapnauraan.com/ckfinder/userfiles/files/38092146757.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/buxiwusividevug.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/ramobinugukirerikap.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/86618382523.pdfIn PDF document text
    • http://robbes.nl/media/files/41637468699.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/86316342559.pdfIn PDF document text
    • http://le383.com/uploads/files/wodot.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/81810738179.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/74777277429.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/nefipob.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/19270676657.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_off0000be51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD663 18648 bytes
SHA-256: bb9c0877345cae3e965ed9493d1f1bc8dfee991a4dea4f1a0a4fee67e15ad443
font_02_sfnt_off000105ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CA 11144 bytes
SHA-256: c978f408f322fe6ecb6c090d1ac269ae877b096500b7858c27952be8d12f301d

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