Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d40f01bf996e50…

MALICIOUS

PDF

92.1 KB Created: 2021-09-08 13:37:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 893b8baeaae3816b592bba4a8123e3c1 SHA-1: 530e011ddc959594a0dbfdd6236ddfa2fb8a6e7b SHA-256: 00d40f01bf996e506b974f1ce0daa8a678dd75d12cada700ba8e8cf6dd2641bf
166 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics as malicious, including an ML classifier and ClamAV, indicating it is likely a phishing or scam document. The presence of numerous external URIs and the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic strongly suggest an advance-fee fraud attempt, possibly using a lottery or parcel delivery pretext. While no scripts were explicitly extracted, the PDF structure and embedded links point towards a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://sunpower.lv/ckfinder/userfiles/files/95985435900.pdf
    • http://trips-in.com/ckupload/files/laropun.pdf
    • https://debden.org/userfiles/file/
    • https://rusepress.com/uploads/wysiwyg/files/zugojajorupar.pdf
    • http://kjphotocon.org/data/userfiles/files/60705720947.pdf
    • http://theprofitnesstrainers.com/userfiles/file/nexijigesokeferigugozed.pdf
    • https://firesystem.ro/imagini_ws/33228662370.pdf
    • https://hygradeinsulators.com/images/uploads/file/63546027391.pdf
    • https://cgeminfos.ma/upload/file/niparilatuginibikonusewe.pdf
    • https://service-panev.com/userfiles/xelubogixawovabanowuf.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f96081a65b---xujapof.pdf
    • http://girc.ncue.edu.tw/ckfinder/ckfiles/files/ranobojevefaxifibigowiwuk.pdf
    • http://studiotipaldo.com/userfiles/files/jorikiterunigufezojexu.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/63269845c1580c42faa3f7f1f03a91b3/wexaweti.pdf
    • http://viorina-deko.com/images/file/jukimebaden.pdf
    • http://nfraccon.org/userfiles/file/jatiwuderugeko.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=financial+reporting+manual+for+maryland+public+schools
    • 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_off00010112.bin
a3e3f5b213cea0d16bddaf7bcd3f2865c3ff3e87c0f8e6109acc142f326faebb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10112 11400 bytes
font_01_sfnt_off00011b53.bin
ade785bd42af6b2d8385036fcac1bd6182c25cf737407f8b9e12830d51a9bd55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B53 18620 bytes
font_02_sfnt_off00014b44.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14B44 16792 bytes

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