Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e31e8d99ad67752…

MALICIOUS

PDF

165.0 KB Created: 2021-07-06 11:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c2a9291192771a3af7a63d620ea0a6a7 SHA-1: 2b9266547ba57ff7f27860fb3a0c7204535e3ceb SHA-256: 0e31e8d99ad6775251fc0b841f8e2d17d1d678d025b68db2877de1db06c8bdad
196 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and heuristics indicate it is an advance-fee scam lure. It contains numerous external URLs, many pointing to compromised WordPress sites, suggesting a phishing or redirection scheme to facilitate the scam. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9735

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 https://infrive.ru/uplcv?utm_term=federalism+and+ethnic+conflict+regulation+in+india+and+pakistan+pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/8e36935f243bf8191c10d8917998356a/manojatixavobutoja.pdf
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/160790c85426f0---bifigozowawekar.pdf
    • https://hyosungulf.com/uploads/file/wodofo.pdf
    • http://alt-1c.ru/userfiles/file/bakojogi.pdf
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/17701597871.pdf
    • http://aliceinformaticasrl.com/user/pages/vemakipo.pdf
    • http://okzawidow.pl/img/upload/files/45171820467.pdf
    • http://bajcsidavidfoto.com/_user/file/wapab.pdf
    • http://princeverma.in/uploads/files/38044674979.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/24e7ab51d6b4073c3553d3126ec1dfe8/4946729467.pdf
    • http://bygreenpure.com/userfiles/file/47908826864.pdf
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1609670a76f962---21577580301.pdf
    • http://diversecityuk.com/userfiles/file/28398185937.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/6jp602s6g47ct2hqisvag4kqe3/3921589832.pdf
    • https://communeouchamps.fr/userfiles/file/84941019015.pdf
    • http://yongqingtech.com/d/files/kujorozegug.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/2b417d3855fdcf55b8010a5bffa1560e/90462167515.pdf
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfad2b0e42---judeto.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d04e1c6a02---90086646495.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/sgkl89suuh811fu9kjn1kke7gi/18511244237.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4c7daeb74---kajonezelesopumalegavori.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b007e0e2723---jadiroxa.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/728b1fdc40996d2e0a412933bfe58cbd/biweberovufaferamuba.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/ce2b00d290da21f2697fd2cb7c909ef5/bodemebipev.pdf
    • https://energooptima.hu/upload/File/wabonuzaxuvajanusilite.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b21d97c16---53321259918.pdf
    • 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_off00022328.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22328 16792 bytes
font_01_sfnt_off00023b3f.bin
ef92be392fd74aca727c36f5675fa5a9ad27edd16a3fe83e3ad3e79b35bd2627		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23B3F 11236 bytes
font_02_sfnt_off00025528.bin
412249f65d52aab5d63b783b8a6e99bd1d268412a88b23a9ecad6ea1d9574e74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25528 18800 bytes

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