Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00338bf392b7ea6…

MALICIOUS

PDF

70.7 KB Created: 2021-06-21 05:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7305967ba5f05e4280ad5c67a1e0a497 SHA-1: 5a3a1de265f9b8bf482e7340927d6415922afdcc SHA-256: b00338bf392b7ea6d6dfdc5830d6a415e7b7303714e5362b3ecd14f19c3099b5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document exhibits characteristics of a phishing lure, specifically a payment redirection scam. The presence of multiple external links, many hosted on compromised or disposable domains, strongly suggests an attempt to redirect the user to malicious websites. The ML classifier and ClamAV detection further support its malicious nature, indicating it likely serves as a dropper or leads to a phishing page.

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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=pf+withdrawal+form+10c+online PDF link annotation
    • http://fashioneducation.ru/userfiles/file/21374811175.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/82011661898.pdfIn PDF document text
    • http://aczelzalog.hu/tmp/47553257700.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16099abdaf053d---84671263596.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/srctng0nld9e4f21bq7j69r0r9/jekuvamajapoboxifizuruv.pdfIn PDF document text
    • http://tcihk.com/userfiles/fumamuputozog.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c0a8c0d70---pujojerelite.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/govoke.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/zedizelawes.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad4d918ca1---xalolunuzemikudajaxu.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/416f2b652b7f20c05a6b7391bd8f183a/58594462410.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/kezaritonekapes.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/tagafinewokuvexabumiwubi.pdfIn PDF document text
    • https://cafesca.org/ckfinder/userfiles/files/kogalivujavaso.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD606 5368 bytes
SHA-256: e3895c49e04600e535554840623b2a157b9242e38d2b3e14b764c38cdbd19c6c
font_01_sfnt_off0000e833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE833 11144 bytes
SHA-256: a0cc5752488a6d81768c758cf1ed122c502666591f867a8b154df97bfa367e2c

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