Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1d501db06f71e2d…

MALICIOUS

PDF

81.9 KB Created: 2021-09-02 15:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5b334dc777f8f5f48c69a4b9ddfc32d0 SHA-1: 6c6ef85d42e3f19c1470685caf5e654d2bf76757 SHA-256: e1d501db06f71e2dbd17cd1382769edbc2fb5a8cab9c2c8919485eea96457bf6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/pituvipujilonoratexetiwa.pdf In PDF document text
    • https://goldfieldssanddrags.com.au/ckfinder/userfiles/files/dexepirisoxifiwug.pdfIn PDF document text
    • http://www.casasemio.com.br/ckfinder/userfiles/files/1675898102.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa2683ac8---notomifilolijok.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/27931419491.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/50816597466.pdfIn PDF document text
    • https://073741256.com/uploads/files/202108182117486064.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703299a1397---53367394621.pdfIn PDF document text
    • http://kientrucnhacuagio.com/upload/files/25894426674.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608caff7e2fab---noreregekegi.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a635adeccb2---84534721361.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/4e9e24d044470942d3a1e234cc1cf53e/8808023187.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/vasidigarogufel.pdfIn PDF document text
    • http://copelandreunionla.com/clients/6/66/66f6f3de7053633686652f51c4c00696/File/52868952183.pdfIn PDF document text
    • https://rtvpuls.com/ckfinder/userfiles/files/79086367237.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/jumivigu.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c3de7a57d---xapuvegunawasuz.pdfIn PDF document text
    • http://amirmazandaranihospital.com/ckeditor/files/files/34428640861.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607935e421155---lapawuxizar.pdfIn PDF document text
    • https://turkuazhost.com/calisma2/files/uploads/foturatimadiwiziz.pdfIn PDF document text
    • http://henrycrawfordreunion.com/clients/1/19/1929e20d1ffebcad6d8b2a659e9c170d/File/68534947505.pdfIn PDF document text
    • http://rasciindia.com/firetech/ckupload/files/vuzatuwelapa.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/botalamawoxazex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=the+silk+roads+book+pdfPDF 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_off0000dbe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FC 10588 bytes
SHA-256: e9a60aa6cb0a24410eeff05b557b4e43ebd5746ac9093ea9b018812a880be900
font_02_sfnt_off00010bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFE 17828 bytes
SHA-256: fc2ce6565791e9d75ee6ec6cdc2d37d675961657973e38f1f047838aade00b10

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