Malicious PDF — malware analysis report

Static analysis result for SHA-256 02846030df102911…

MALICIOUS

PDF

97.4 KB Created: 2021-08-12 21:23:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 24268ed5d1fc7432a0a5cf85c0807cf5 SHA-1: 321774237b7758b57f3914bf111f93d5c521edba SHA-256: 02846030df102911b7902903978e3c25bd18beba4f6fb5cdf009e90eca441cd3
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely provides instructions to open a password-protected archive, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pixomot.ru/uplcv?utm_term=tipos+de+relaciones+humanas+en+la+empresa PDF link annotation
    • http://przychodnia-felinskiego.pl/uploads/editor/file/51038925327.pdfIn PDF document text
    • https://nepalipublisher.com/ckfinder/userfiles/files/69878903545.pdfIn PDF document text
    • http://alexandercdg.com/clients/36029/File/xusesalifekarawafarobup.pdfIn PDF document text
    • http://fqcycpa.com/jingkelun/userfiles/files/20210619204851.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608507cb455ce---59341122771.pdfIn PDF document text
    • http://hattingtoemrerogsnedker.dk/userfiles/file/digepuzaxojokidixip.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/a3f206e4eca6174cccd4d32981bfe86d/reparagufamil.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/4l4o12cknlti21f0retbk23tep/xigemenuvivofi.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/87745774252.pdfIn PDF document text
    • https://cebrigantina.com/025-CEB/images-editor/file/duzuluwoxanutos.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/b628uj0lpctommgrbdfaq3sr61/damaxumufibogumomefozipew.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/kglvu9btcqbmnohvfk5el0bk3h/26045121000.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/posadagemuzosij.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0a576c4f5---95792629310.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b0f0133c6---fanasepimufowagolegaw.pdfIn PDF document text
    • https://stegopackaging.com/wp-content/plugins/super-forms/uploads/php/files/5hppouah582ajbo4rdqahv03lq/61853887931.pdfIn PDF document text
    • http://changrung.com/ckfinder/userfiles/files/46117343909.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4bcaa90bb---fadetekuza.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c910b058c8---zixerobonadupudobarewuvol.pdfIn PDF document text
    • http://mikllc.mn/uploads/files/zimukiwipawakuwi.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1cbc4ffe2---92855646261.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/40b2becc7f512549744211bd12938076/zudexe.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c58b0153b1---4922730383.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e28673d6a68---80335210198.pdfIn PDF document text
    • https://energiadirect.pl/application/resources/ckfinder/userfiles/files/86868354127.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_off0001165c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165C 10744 bytes
SHA-256: c7cdc3f5fa6dd9debf0029eef4e2d3cb29fb671490db4d4a591e1b4edd0c6854
font_01_sfnt_off00012ec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC8 18464 bytes
SHA-256: bdb544a12708257ab8fc845d2c416a57a155cbab85e51bd1f33370c38c8afbfa
font_02_sfnt_off00015d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1