Malicious PDF — malware analysis report

Static analysis result for SHA-256 9972565155c61fb4…

MALICIOUS

PDF

74.6 KB Created: 2021-09-13 07:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 903fca5b8506305f67954e75da64d643 SHA-1: 1c34b1b8e4e23c4b98c0069bdd1f196796d1c3dc SHA-256: 9972565155c61fb461cca98fc6029f936a8fb679c29e684e4e024e4e0d99a22f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to potentially malicious content, and the ML classifier and ClamAV detection strongly indicate malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests a link farm designed to obscure the true destination, likely for phishing or malware distribution. No scripts were extracted, but the presence of external URIs and the overall detection profile points to a common phishing or malware delivery technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://ylplj.com/ckfinder/userfiles/files/wujasizoduzugedefapa.pdf
    • http://s8radziejowice-paszkow.pl/userfiles/file/328287992.pdf
    • http://nghieuphong.com/upload/files/kufirepurutopizarirop.pdf
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/rurewasanazotawisa.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135193409c66---sujivanesogubabanofuxobuw.pdf
    • http://generaltubi.com/container/ckfiles/files/1956957351.pdf
    • https://ehlibeytalimleri.com/resimler/files/panokegiba.pdf
    • http://jtylek.pl/Upload/file/65617304243.pdf
    • http://chieusangducphat.com/uploads/userfiles/file/52567863478.pdf
    • http://studiozoppini.com/userfiles/files/15063147530.pdf
    • http://suvenirzp.com/uploads/files/rabenabe.pdf
    • http://smart-ventures.ch/upload/Editor_Images/files/jigitineja.pdf
    • https://www.khaosanpools.org/ckfinder/userfiles/files/47393159100.pdf
    • https://defi128.com/userfiles/files/47407314007.pdf
    • http://sysquare.com/UserFiles/files/7954117317.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131f1fa1aee9---mukusizanifubeb.pdf
    • https://tumsad.org/img/editor/image/file/52236033557.pdf
    • https://digiconelectronics.com/media/jasetuzibagifigozozilotu.pdf
    • https://dadesigning.com/daduserfiles/files/14858340719.pdf
    • https://store-connector.com/_upload_bilder/_filemanager/file/lenikojazawatoniboponula.pdf
    • http://laarakkers.com/ckfinder/userfiles/files/vuninitir.pdf
    • https://ilexgold.com/app/webroot/files/userfiles/files/xovujexa.pdf
    • http://kcemsp.org/upload/editor/file/21541553033.pdf
    • http://axi-hohenstein.de/userfiles/file/xudafizalugazazapomunen.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=25+free+instagram+followers+trial
    • 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_off0000c2b0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2B0 16792 bytes
font_01_sfnt_off0000dac7.bin
0075aa72c3c7c981c55ebb448b0bbb591fa7219fc2d67f69573a38659ad7e421		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC7 10800 bytes
font_02_sfnt_off0000f3c2.bin
ffe29f49c9d2221dcb52691eab5cef2637276bd86dd011be7a47aefbda031ad3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C2 16128 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.