Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c6d3531100a19b7…

MALICIOUS

PDF

85.4 KB Created: 2021-09-13 17:15:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 53e6b5345c2e533d77fe61a7b107cb42 SHA-1: 5d9acb441815b540a8a9fb0c79d44c1faadbb100 SHA-256: 7c6d3531100a19b782e7bd9615c006c1923e11c38478bf82fe06f6cfa3657451
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of an advance-fee scam, including language related to prizes and parcel delivery requirements. While no scripts were explicitly extracted, the presence of numerous embedded URLs and the ML classifier's high confidence score indicate malicious intent. The document likely serves as a lure to trick victims into paying fees for non-existent prizes or parcels.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/ebe80926c83bd8a2d114f717f4e5d004/dedike.pdf
    • http://eshop-kocicinadeje.cz/files/file/wugokulibejelanugeka.pdf
    • http://rescue119.org/userfiles/file/sesefabi.pdf
    • http://biomax.shop/filespath/files/20210902003510.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d177a6ebf8---miwaxaxoragekipus.pdf
    • http://pate4me.com/userfiles/file/681533936.pdf
    • http://flashdisplay.net/UploadFiles/FCKeditor/20210905052415.pdf
    • http://inspiredindianfoundation.org/uploads/zisigi.pdf
    • https://czus-lukasa.sk/userfiles/file/zesan.pdf
    • http://eksternest.be/images/file/32238947920.pdf
    • https://tunguoilon.tunhua.vn/ipp/images/uploads/files/fanetetukagipifolitoro.pdf
    • https://safarekhoob.ir/basefile/safarekhoobir/files/68757084204.pdf
    • http://mueblesdepladur.es/1/userfiles/file/86654081572.pdf
    • https://digicpictures.com/downloads/gomorazawokisebes.pdf
    • https://vicotelecom.vn/static/source/images/file/fufetukesetiz.pdf
    • https://tuoitre.bacgiang.gov.vn/lib/ckfinder/files/33489192668.pdf
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/wufedefoxowixi.pdf
    • http://lovesenergy.com/file/57008147561.pdf
    • http://kqcme.yiaiwang.com.cn/upload/files/fanarotuz.pdf
    • https://argentinaproduct.com/ckfinder/userfiles/files/xuparidulotefotevupivazef.pdf
    • https://bem-sa.com/img/file/69242238688.pdf
    • http://harlit.com/upfiles/file/67436387868
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+hack+android+phone+using+ubuntu
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e812.bin
c68844a1491af81803f29b9033d323e653ffeefda1e1f7fe6f46ec8278808c45		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE812 11156 bytes
font_01_sfnt_off000101b7.bin
8b5a9f5c2640cab2fd75a2118c37b2f74d204a68675176db5e44e82acdf3db3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101B7 17620 bytes
font_02_sfnt_off00012fc8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC8 16792 bytes

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