Malicious PDF — malware analysis report

Static analysis result for SHA-256 b242193d418be060…

MALICIOUS

PDF

79.4 KB Created: 2021-08-28 18:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8f009c71eed2523eb8ed3b729a85b779 SHA-1: b31688a239e1a8a31d6259cd0206e19c0a979daa SHA-256: b242193d418be060bdccb83d8a9602aa57b30cc699741aabac00ae7d8a9b3fd1
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to external websites, some of which are hosted on compromised CMS platforms. The primary purpose appears to be directing users to potentially harmful content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 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://chcial.ru/uplcv?utm_term=dungeons+and+dragons+5e+handbook+pdf PDF link annotation
    • http://adamlegal.com/userfiles/file/88727716992.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/69639050103.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c46112b0149---wiritibefugopedosivig.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/67438381946.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/madodatajero.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/e3bdf7ef218568a13276c14338c201cf/maduxusamiwemeduwoneziki.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/boxexixiraruso.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607693a5bf46e---22289048418.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac9f4b122f---zubugetidat.pdfIn PDF document text
    • http://okfilm.kr/userData/board/file/varituzimorudevef.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/lilebogufo.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a86754fdb---darazadefupupoli.pdfIn PDF document text
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/22850873800.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/91849178793.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/3676805887.pdfIn PDF document text
    • https://smartmedia.ro/app/webroot/files/userfiles/files/29406709945.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/92865116099.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16072eb7bdacd3---tiwaselamoka.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/69j3csm8uu8ks0o63lcc1fr2p1/woxij.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/35201003910.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/de3936587da5a9fb99bbce1c895dddaf/busujotozojerejazedux.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c99371dbc---4100925263.pdfIn PDF document text
    • https://sambelteri.com/contents/files/34404562337.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B3 17696 bytes
SHA-256: 1ef46a52fabb7c32c937f751f11114362d5dea9796400818b1684ed2b07f2f45
font_02_sfnt_off000116e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E3 11008 bytes
SHA-256: 3455f509193d60ec72f86e9956740a0562f0e86ea17ccfdfd349c216b37ed882

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