Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbe8130d0a933c2b…

MALICIOUS

PDF

78.7 KB Created: 2021-10-07 07:53:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b8481ec3165b0491d610732e5421f2c3 SHA-1: 33abdcbadd7aecab8b544aa9572fb64a5968d8c9 SHA-256: dbe8130d0a933c2b8b47008111d562894cf2084e5e1d488fd827451134ea5855
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm on disposable hosting, suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the nature of the PDF and its numerous external links point towards an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://horizontire.com/userfiles/file/rawujizazudagi.pdf In PDF document text
    • https://webmedcentralplus.com/userfiles/file/88389820690.pdfIn PDF document text
    • http://logopeda-empatia.pl/content/file/85602882053.pdfIn PDF document text
    • http://bfttacg.marketsearching.com/upload/files/mizoginofubewesufofe.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/73822935097.pdfIn PDF document text
    • https://bywuf.org/upload/editor/files/romoxe.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/63699669006.pdfIn PDF document text
    • http://bannhuaduong.net/upload/files/50605252490.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/lejekokiforoneseza.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1615e19784ccf3---xamaruvemuzu.pdfIn PDF document text
    • http://chayka-svg.ru/files/32834677384.pdfIn PDF document text
    • http://aweibel.com/Photo/file/fupemaxexemovomibepon.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161328ff88a66b---mutapon.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/zezigokefopir.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/xubaj.pdfIn PDF document text
    • https://generalaudit.pl/eurostyl/photos/file/gixuzamitesipubap.pdfIn PDF document text
    • https://noclegsosnowiec.pl/eurostyl/photos/file/45017517201.pdfIn PDF document text
    • http://spharma.ua/files/file/zurowusi.pdfIn PDF document text
    • http://abwrva.com/uploads/files/51178827731.pdfIn PDF document text
    • http://alocainghien.com/uploads/userfiles/file/13879327883.pdfIn PDF document text
    • https://kueapem.com/contents/files/senuvomeva.pdfIn PDF document text
    • http://spbi.cz/res/file/46466037301.pdfIn PDF document text
    • http://dongamold.com/fckeditor/upload_files/file/49492969263.pdfIn PDF document text
    • http://keralatravelpath.com/uploads/file/41793718300.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+see+who+looks+at+your+instagram+accountPDF 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_off0000cb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB85 11060 bytes
SHA-256: a7e20980c67523e3dc96efe2d789c51fb835690008f5f1e1683c72aca811584d
font_01_sfnt_off0000e526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE526 18264 bytes
SHA-256: 2831b468fce3a9482d43ed62c5aaf7d4c0a4a73f9a5fe20088b040efb42c09cb
font_02_sfnt_off00011505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11505 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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