Malicious PDF — malware analysis report

Static analysis result for SHA-256 a95f454714fabecb…

MALICIOUS

PDF

76.2 KB Created: 2021-09-11 04:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c778f17385b6051fbbe0a559d3a379ea SHA-1: 1c47303a92068cb094894418c81730fa3bc4c923 SHA-256: a95f454714fabecbf22e6f7e55c5530279103db16b9d8ad97dd2d3fc654f9863
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which are part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's intended to lead the user to a malicious site, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://anpharma.net/upload/files/masetej.pdf
    • http://didula.com/img/file/59076517126.pdf
    • http://www.lukoilmarine.com/ckfinder/userfiles/files/18354265610.pdf
    • https://iqrainternationalschool.org/_assets/files/bizirofejevegukamum.pdf
    • http://asustainable.com/global/file/49908937458.pdf
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b399c92a56---25370537844.pdf
    • https://eletroluz-al.com/_IMG/img_internas/file/razisefisadipolokuvuw.pdf
    • https://pastravariaizvoarelebratiei.ro/images/file/95089195239.pdf
    • http://skolky.info/foto/images/file/59278947945.pdf
    • https://whatproperty.ng/ckfinder/userfiles/files/rijotag.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139b48724772---96416480522.pdf
    • https://jagamimpi.com/contents/files/kavarenebuz.pdf
    • https://scalping.ir/data/files/file/52668937608.pdf
    • http://www.mecateengenharia.com.br/ckfinder/userfiles/files/xomera.pdf
    • http://www.bargiel.com.pl/ckfinder/userfiles/files/17399369362.pdf
    • http://kelvista.lt/images/files/28084519579.pdf
    • http://defhjdr.friend-match.com/upload/files/35296285346.pdf
    • http://paramountswimwear.com/userfiles/files/gakeloto.pdf
    • https://presentkompaniet.com/img/content/file/29586533715.pdf
    • https://nada70.org/userfiles/file/tapasolevoj.pdf
    • https://vvpta-irvine.org/userfiles/file/43653325532.pdf
    • http://tbm-mova.by/images_from_html_editor/file/jonejonagufeduwolekezefi.pdf
    • https://es21sys.com/userfiles/file/53318560473.pdf
    • http://n3ss.ro/ckfinder/userfiles/files/39979126553.pdf
    • http://olddieselparts.com/ckfinder/userfiles/files/venokufawejalubanaxip.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=jatt+di+clip+2+song+download+mp4
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3fe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3FE 16792 bytes
font_01_sfnt_off0000dc10.bin
2f26c593cef3965a7131d913d98ab78c904d8cbedd9ab9870f88994bf1e7c62a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC10 17676 bytes
font_02_sfnt_off00010a36.bin
5d0515911a9a178caf24e91975990c315bc856765f2f5c2c2f1831ab0de745d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A36 10900 bytes

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