Malicious PDF — malware analysis report

Static analysis result for SHA-256 380dd8e4223fd1f2…

MALICIOUS

PDF

84.1 KB Created: 2021-06-14 20:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6ca197896cbbf1ba50813e0ca7689a39 SHA-1: 0f16003c75653c5bc55374c37cfc2a0b01c1ec3b SHA-256: 380dd8e4223fd1f263ea7f6857f1dc029c4d4127a20c920dc93d2eec587457c5
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing and malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://catamma.ru/uplcv?utm_term=wow+classic+retribution+paladin+leveling+guide PDF link annotation
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160739a4f214ce---66929901003.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/40825a9a3a824655521e3ef70136745c/54085958487.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5dc2714e4b---modumibisezilunem.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/62671049435.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/wabitalukigoserixupi.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/ffaa6196e364aa6ae311b4d31fc40d18/sazujekotimelimefepimime.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16079a126a8297---jovezemojaf.pdfIn PDF document text
    • http://jordanfamilyreunions.com/clients/5/51/51534e3e38036466a76ca8a024fd4923/File/57573140815.pdfIn PDF document text
    • http://ideas4mypool.com/userfiles/file/37609937286.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/11cb4ee2f5240febde25509f9224fefc/97774595270.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/rhs6elq8cuhm9s134mmmq14mqv/geratowulanojujilew.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/buromebasos.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/mrqmkl0317tqpmf9mec56k1qrj/94061768804.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/ad31e4eae2c5d83c1076e4f86188722b/tesotot.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/6062417b480ba523f7f990a704ec3f57/dolivivonosewobag.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a06c15ed3---23432204066.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4e0123c34---semibomupujid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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_off0000fb0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0E 5428 bytes
SHA-256: c273a5f2054a5d67766f1a7002082dd8d8acd6938dc1b3805f3e9a24241bf18f
font_01_sfnt_off00010da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA2 11532 bytes
SHA-256: 1db1b1e4e97d62ab0d4d33d1b384f43c114fb9dea22f5fc95c3ace2f5f2b836e
font_02_sfnt_off00013502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13502 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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