Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6cab94dbd76c66…

MALICIOUS

PDF

83.3 KB Created: 2021-09-08 18:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 48a3d3ff50dc29785604bfb5a249aac7 SHA-1: 3a2ac57e4b257788c3712cea86e621024d70193d SHA-256: de6cab94dbd76c669b45ba9dcd9b833e961da349e04d23779d99097d59d6d676
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to other PDF files hosted on compromised websites, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the link farm and the presence of external URIs suggest potential for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://abwmarlboropike.com/uploads/files/fozewotobaxofakiga.pdf In PDF document text
    • http://md-servicios.com/userfiles/file/13929972818.pdfIn PDF document text
    • http://plise.org/userfiles/file/noropezudavugafobezezirob.pdfIn PDF document text
    • http://www.jucadent.es/ckfinder/userfiles/files/67032759585.pdfIn PDF document text
    • http://dallard.fr/ressource/site-image/files/59501245339.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/333f008109517aa54b9284349cdd32d5/80577446225.pdfIn PDF document text
    • https://www.jancsoalapitvany.hu/ckfinder/userfiles/files/misirikabapusifajif.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/bipovesuripubusoji.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/vipapifidofefater.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/5e259a9e4ffc9c6ecf162ea650f89f11/xosefume.pdfIn PDF document text
    • http://mexxeopaint.com/upload/files/65771713690.pdfIn PDF document text
    • https://spotiverify.com/ci/userfiles/files/suxasatigigovanurusiga.pdfIn PDF document text
    • https://cingenito.ca/upload/editor/file/daluvone.pdfIn PDF document text
    • https://cezartravel.hu/userfiles/file/32372175991.pdfIn PDF document text
    • http://lexuspolymers.com/assets/ckfinder/userfiles/files/39892215383.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/eec4bb967a0d6a24415559c37f81e031/58785315860.pdfIn PDF document text
    • http://ms-krmelin.cz/app/webroot/files/files/merepitux.pdfIn PDF document text
    • https://agrando.cz/files/file/vepasalolusagixefejove.pdfIn PDF document text
    • http://kme-kme.cz/files/file/robapisute.pdfIn PDF document text
    • http://teraval.cz/res/file/30959875620.pdfIn PDF document text
    • http://trivio.it/userfiles/files/bebavezi.pdfIn PDF document text
    • https://pomacanthe-art.fr/imagebeforeafter/files/14264724475.pdfIn PDF document text
    • http://borik.customreal.sk/data/files/46562936514.pdfIn PDF document text
    • http://munnarteabungalows.com/userfiles/file/xawaxilupurewoko.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/161329729f0724---nunaw.pdfIn PDF document text
    • http://qapoll.com/2015/vat/upload/files/54302289059.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=factoring+trinomials+with+a+leading+coefficient+other+than+1+worksheetPDF 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_off0000dc1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1D 11128 bytes
SHA-256: 328b874008497420041b96696f874016fde204288ddad5f9999899dd30ca43c7
font_01_sfnt_off0000f5d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D0 18660 bytes
SHA-256: 997ab47009d1003c665cc4ef17487b1208566acdfa10b1f879c321f2e7273143
font_02_sfnt_off000126bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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