Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d7e0b536db0f8c…

MALICIOUS

PDF

141.8 KB Created: 2021-06-11 20:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: aa57b0fd2dd6474ffc6fdb8afd03c53a SHA-1: 83305360e104093335dbbf4c8a6f1138bb568665 SHA-256: 00d7e0b536db0f8c01795ae20439972e0e7e5d69fd7e4b8480542052a7189e4b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://crysiq.ru/uplcv?utm_term=safe+n64+rom+sites PDF link annotation
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16076662bdaa81---52252629668.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/9f97cf146ed989af87a8c212aa079d45/rogasepibene.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/jgdnn80ip952rfq23ledhgni17/36345000134.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e46a4a2e4---nukalosubadamunilegem.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/b25481c3ccb7a30e54ca0355d3ce6e12/wivaretugexep.pdfIn PDF document text
    • https://thaiwoodengames.com/files/upload/files/36415628958.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cab20112a2---gapike.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/1a4c0426b49ac3bded1a7963660c8bb3/batuvanukiwepexofajobiwi.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb65c8c0552---47402634385.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/mekebovojovofogera.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5736cf61b---vadufepopuwaju.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/kemidisupemifup.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160892ac5e36c5---jenajagepexinapum.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/pewugapupovanisape.pdfIn PDF document text
    • http://bjjiffy.com/upload/26754937804.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/kdn6iei3442mt1dnn237qqavb0/tawakarovozupawulisotit.pdfIn PDF document text
    • https://oteaexpert.fr/cite_imgs/file/49044266541.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609d8d336fb3f---xusujajutovudasema.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b38f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B38F 18696 bytes
SHA-256: dd1befccfcb21bfa284cc250edc38f9013e2cc5a2eb85d798f8dd6f8bde4d0bb
font_01_sfnt_off0001ef5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EF5F 5224 bytes
SHA-256: 336eea089d92bf4f07e384a873cee9dbbe168004f62289f5fdd2bba007414c0f
font_02_sfnt_off00020114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20114 12056 bytes
SHA-256: a390fcfceb086eafc4431b50d68f80060d47c837db7d3ef842f2735ce8d3bca2