Malicious PDF — malware analysis report

Static analysis result for SHA-256 f657fe7c0d622060…

MALICIOUS

PDF

80.7 KB Created: 2021-09-08 08:01:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1c8e253c0242d9ad73c23b18dcc40367 SHA-1: c81e9168c4447a8ece13b166e1cb506deb024bb1 SHA-256: f657fe7c0d622060b277072149df8915dfbd49054ebc701d6f753a73d80cc061
196 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as a lure for an advance-fee scam, specifically mentioning lottery or prize language combined with parcel delivery requirements. The ML classifier also strongly indicated maliciousness. The document contains numerous links to potentially compromised websites, likely intended to host or redirect to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608082e26581e---12164986434.pdf
    • http://pretaporter-pegah.com/userfiles/file/vavujugaxolugalavukufil.pdf
    • http://cupta.org/userfiles/files/20210701030410.pdf
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/disudedurovarof.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/as6ufjsdk678au06kovpofpqdt/81265783831.pdf
    • https://vieclamxaydung24h.com/upload/files/92757734827.pdf
    • http://lnianemarzenie.pl/userfiles/file/xovasefagaxor.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abdf785510a---mapewa.pdf
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/daffb2a4a3b336540d7d6ce085be101c/65017861579.pdf
    • http://hotararicedo.ro/files/files/4447421427.pdf
    • http://studiobonvino.com/userfiles/files/ritagekoxegumot.pdf
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/lilumuje.pdf
    • http://galluccifaibano.com/userfiles/file/digelirur.pdf
    • http://umffz21.ru/admin/ckfinder/userfiles/files/xuropod.pdf
    • http://koddous.com/userfiles/file/fiwogure.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16103b1df2368c---20236237049.pdf
    • http://homespakistan.net/magzine/uploadfiles/file/11792855673.pdf
    • http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/rifupetubuladadepupix.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ac37ba2de7b51df1cdf3ddf7cccd52db/34182309400.pdf
    • http://profesniprukaz.cz/ckfinder/userfiles/files/zapek.pdf
    • https://llibreriaha.com/img/events/file/64829124710.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612cd474e7d8c---92367562795.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=briggs+and+stratton+500+series+158cc+engine+manual
    • 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_off0000d239.bin
acf775d3b2c54907f643dfeec2fc1ef756ee75092f21a09d8aa699e99ab1c976
pdf-font-stream PDF embedded font (sfnt) at offset 0xD239 11380 bytes
font_01_sfnt_off0000ecea.bin
447a76fd736fd7b50d7511f37975ffb6d0ac4167a3cd09f14093c15a5f644ac1
pdf-font-stream PDF embedded font (sfnt) at offset 0xECEA 18612 bytes
font_02_sfnt_off00011cea.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CEA 16792 bytes