Malicious PDF — malware analysis report

Static analysis result for SHA-256 eccfa63b1f28ad1f…

MALICIOUS

PDF

69.3 KB Created: 2021-10-04 10:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b26b23e3546ea20e9e1699ab7e3d1ff6 SHA-1: 2c6c869972a9ccda22f5bf8b5855d7b3b7725f00 SHA-256: eccfa63b1f28ad1f0cc86d5bc19b0dbadd393a877bcd8e16eff5f78cf2742155
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm with numerous URLs pointing to various domains, many of which are associated with compromised WordPress uploads or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://pratham.one/file/dejiweweneziwum.pdf In PDF document text
    • https://gobelsprofil.com/upload/files/mopaseki.pdfIn PDF document text
    • http://sakesushilakehavasu.com/uploads/files/rinaninuvujoxawezidez.pdfIn PDF document text
    • http://sunriverps.com/data/editor/file/momawipupozana.pdfIn PDF document text
    • https://aromamarketing.md/img/files/nuwajozad.pdfIn PDF document text
    • https://beautifulhairstore.com/upload/files/dodinamatosikelevevebi.pdfIn PDF document text
    • http://przybyszewski.org/image/file/2042382985.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/18878952333.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1615844cd83db8---94661226374.pdfIn PDF document text
    • https://rtvpuls.com/ckfinder/userfiles/files/24879992944.pdfIn PDF document text
    • https://pima-alarms.eu/slicice/file/81972833234.pdfIn PDF document text
    • https://maviet.vn/upload/files/98220924548.pdfIn PDF document text
    • http://greentreeprep.com/cote_dor_import/admin/ckfinder/userfiles/files/kuzopufazud.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/88522058929.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/5b749532c2e6c0e08e3e7ee8f3c72d16/takison.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/90171982588.pdfIn PDF document text
    • https://praktijk.zorglink.nl/ckfinder/userfiles/files/52877811572.pdfIn PDF document text
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/demenanizib.pdfIn PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/wapise.pdfIn PDF document text
    • http://kondicionery-dzerzhinskij.ru/upload_picture/file/17637802337.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8e44991c5de6f02567f21f5549a3d425/vuzomatuwuxivoxati.pdfIn PDF document text
    • http://vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/40579739487.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/gamefifafebobatuleweniz.pdfIn PDF document text
    • http://glovimex.com/uploads/ckfinder/files/18818752855.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=benefits+realization+management+a+practice+guide+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_off0000aff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFF2 11176 bytes
SHA-256: b242c42a325391173c9a066a3299af5e4a29ec97a775074713f4d8ffaa96d776
font_01_sfnt_off0000c9f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE205 14680 bytes
SHA-256: fcd4184e74a638b37c6bf3bd72183c59e4fa812fc2af17787468a4709315d897