Malicious PDF — malware analysis report

Static analysis result for SHA-256 7665704eda038515…

MALICIOUS

PDF

81.1 KB Created: 2021-09-10 16:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ceef8ae3df691f3b4f8f3d7449cd10ef SHA-1: 6089c7b0dcaa663960f7af1cc54b83713e738d0a SHA-256: 7665704eda03851562fc696f185861f545fe9a76275319a9563e4ec93f18b667
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with many pointing to unknown or potentially malicious domains, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and the presence of many external links align with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://safetypadlocks.eu/eurostyl/photos/file/49394671153.pdf In PDF document text
    • http://n2nnetworks.com/files/others/33295695463.pdfIn PDF document text
    • http://goang-hann.com/uploads/files/202109030430094463.pdfIn PDF document text
    • http://domainecomps.com/documents/files/12170097360.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/96116836337.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/64089126536.pdfIn PDF document text
    • https://worldpigment.com/image/upload/File/41189539038.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/36521460611.pdfIn PDF document text
    • http://xn--jt2b56wn0ap2a.com/upload/file/202109090756535620.pdfIn PDF document text
    • http://hairfibers24.com/upload/file/tikidajiz.pdfIn PDF document text
    • https://penmypoem.com/new/admin/uploadfiles/file/81353464119.pdfIn PDF document text
    • http://fantacyhandicraft.com/userfiles/file/bojujilanuvugupiruguf.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/70693694777.pdfIn PDF document text
    • https://ksuskalology.com/images/file/pepadovutegoxugenomarowo.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135bb5dc2a47---kuwesepinujopurileg.pdfIn PDF document text
    • http://nieruchomosciklodzko.pl/files/file/noxazuromuwuxena.pdfIn PDF document text
    • http://www.ezmoving.com/file/ramijopozazejonufiseriwap.pdfIn PDF document text
    • https://tidaksusah.com/contents/files/92962003077.pdfIn PDF document text
    • http://gonvvama.net/filespath/files/20210904013530.pdfIn PDF document text
    • http://52fotki.ru/ckfinder/userfiles/files/6096014529.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=przydatne+darmowe+aplikacje+na+androidaPDF link annotation
    • https://mediaget.com/userfiles/files/gubomijexuxotasan.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD619 18016 bytes
SHA-256: 62fd3abb366954dcfe1aa525ef2dfd80ccb157a815ba674f3365c0684cbfaa45
font_01_sfnt_off00010347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10347 10992 bytes
SHA-256: 29807480dbe963448885dc70b37a23280fbb4569e31ecb8225da6a684f88c53a
font_02_sfnt_off00011cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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