Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b92202d811da59d…

MALICIOUS

PDF

71.2 KB Created: 2021-09-29 10:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 56420576c9073e6783db2e55706f1f0a SHA-1: 50545d7fb644d1d007d2c2e2b297e05ef4f91ea7 SHA-256: 9b92202d811da59d1d77c3b4ac9fb88b0cb333b94fb2bf440237c4fbeaca50b8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs that likely lead to phishing sites or further malware downloads. The PDF structure and embedded content suggest it is part of a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://wastran.ru/uplcv?utm_term=duel+masters+games+for+android PDF link annotation
    • http://turagent007.ru/userfiles/file/xibuz.pdfIn PDF document text
    • http://gospelpour100voix.com/fichiers/newsletter/file/zizoxevobawefezibipuzem.pdfIn PDF document text
    • http://erbaytag.com/resimler/files/fipazuvakagujovefefuzesez.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/bitudimuda.pdfIn PDF document text
    • https://marupyara.com/fotos/userfiles/file/sejelakamigowuxenimodope.pdfIn PDF document text
    • http://yibetter.com/data/files/doges.pdfIn PDF document text
    • http://laskod.hu/userfiles/file/raxakib.pdfIn PDF document text
    • https://emons-verlag.com/testarea/cwsCMSlight/media/files/98946198860.pdfIn PDF document text
    • http://www.xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/ziwaromusozijakilix.pdfIn PDF document text
    • http://taigesw.com/upload/files/puwuketexitazekirarawe.pdfIn PDF document text
    • https://m-isc.com/userfiles/file/bivadon.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/26466627480.pdfIn PDF document text
    • http://icmasistemas.com/userfiles/files/kidujasolumoduju.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136ed9a930b6---51057354481.pdfIn PDF document text
    • https://sanipro.ma/app/webroot/uploaderfiles/54793151867.pdfIn PDF document text
    • https://fratellifurloni.it/file/74182577486.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/66022654109.pdfIn PDF document text
    • http://logopeda-empatia.pl/content/file/37738512465.pdfIn PDF document text
    • http://allasclub.com/campannas/file/takuwowurorivonuri.pdfIn PDF document text
    • http://longruiglass.com/ckfinder/userfiles/files/20210926_075254.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/f26924f77a4f18ed897892e64827b3aa/buromakinuxawirigibo.pdfIn PDF document text
    • https://robertbah.si/files/file/68791170037.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/52859942916.pdfIn PDF document text
    • https://yodishit.com/uploads/userfiles/file/38435835715.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_off0000b2e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000caf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF7 10796 bytes
SHA-256: a4984c04c8cb63be52c0373ef8e854ff02620195b859e232eab914b86b260960
font_02_sfnt_off0000e3a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A0 16708 bytes
SHA-256: 53cdb68c9726abf78d56bca0685aa458a2c85c22c439c275638409ecdef881b3