Malicious PDF — malware analysis report

Static analysis result for SHA-256 59941c32a36bf5d0…

MALICIOUS

PDF

87.4 KB Created: 2021-09-03 15:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f0746833dce268cd29e4713e2a8333b8 SHA-1: aba4d60555f5a50f7f257348dd1effe6dbe98ac2 SHA-256: 59941c32a36bf5d097216258361c1a69f28ac2519766d95b67f1ac6e67d625b6
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to websites hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://abogarestudio.com/userfiles/file/2381008309.pdf In PDF document text
    • http://afgventuregroup.com/cfiles/file/xemasugoji.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608243558e68e---5614865402.pdfIn PDF document text
    • http://ylphs.com/ckfinder/userfiles/files/zejiruwir.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/15322702801.pdfIn PDF document text
    • http://congtyvima.com/images/Download/37600798754.pdfIn PDF document text
    • http://infinity8talents.com/userfiles/file/tamowunubufo.pdfIn PDF document text
    • http://canvangdientu.com/images/file/60234659826.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16129a7fc95406---41538752936.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/a2044b7a10ca62842ae65b96138c8afd/zijegimap.pdfIn PDF document text
    • http://boisehighclassof1965.com/clients/879780/File/ritegaluzez.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/06aafd21350a11f680f7eee11717da36/gumuzofakofepez.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/47ec09ce3c81a79e498d9a3e195045fe/82105202374.pdfIn PDF document text
    • https://irrisyst.eu/files/file/79364641728.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e196a8f4d7---meviredoweder.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/48699171899.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/64696532588.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160af9a6a89180---48766090010.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/80248494782.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/236d6b8dcb0acd9226bcc1d320c59d31/xajivadugogen.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/457d8686c149af65eaa761709dde778c/bojukorazamujo.pdfIn PDF document text
    • https://sanidom.pl/img/file/majukiribumapefubivi.pdfIn PDF document text
    • http://airfa.it/userfiles/file/13363349519.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/96db76d5f40e58d568b68495171dbd46/givifuxamowulalopokexox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=makkar+cue+cards+september+to+december+2019+pdf+with+answersPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFC 17932 bytes
SHA-256: 66fecf877569ad7c4c09a22082d5de2c6d21b7ad6c2f17781ea1ebb8c6fb6ea5
font_01_sfnt_off00011c0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0A 11712 bytes
SHA-256: 3bd81fd06adc982f4cb4a4200736af8c92060a8011dedc8ed62e84021bfc49a7
font_02_sfnt_off000137c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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