Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf6c27981c0d6211…

MALICIOUS

PDF

72.8 KB Created: 2021-05-27 00:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60e49ed2a86cdfb261cca36650780269 SHA-1: f16b7b0bb323060ab97686a49274a8ceecf40695 SHA-256: cf6c27981c0d621181ea13eab8c02f23a1f4e089dd3f5804619b04ab71cf41e4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document exhibits characteristics of an advance-fee scam, using language related to lotteries, beneficiaries, and parcel delivery to entice the user. It contains a suspicious URL that is likely intended to lead the user to a malicious payload or phishing page. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • 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://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609550cc4f963---wewusisesilisuwijuzujik.pdf
    • http://zrdb-drogbud.pl/Upload/file/27996586338.pdf
    • https://salvatoredivilio.it/userfiles/file/15025486728.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082c1ffce7de---90463969261.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/03g3gvvigltrl2cu40oso6uu7d/womadajunapakote.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/dr58nclub7ld1p953da8skjjor/xuzifesasakofakedinep.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8cad49e86c---48829172156.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/0c7e246ebf80f2d4c6943b356123e9cc/sunurol.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e3f0b0b68---sonulagikoxaresuvovitep.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aca21158351---kabofag.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/9d2560e3e5e8e0db264c6d94aadb65e0/dulevaseloroxofokip.pdf
    • http://tasteofruraleurope.eu/upload/File/27324946009.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16078217154cc2---15854511857.pdf
    • http://kapelski.pl/userfiles/file/46034387496.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=computershare+brighthouse+financial+forms
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e01c.bin
9e26986552ca7b00960dd1b6c12f19e267721fe5ad773b674985e8b14e3a8500		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE01C 5476 bytes
font_01_sfnt_off0000f28e.bin
e3d53e8ac74ac657a7d1c0ef36a16e2af05577c9beaf6a6c91d92da347104d93		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF28E 10376 bytes

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