Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e630f56c69da274…

MALICIOUS

PDF

66.9 KB Created: 2021-02-28 17:42:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e4f761b9cd35b5fd5525be1fb6407a87 SHA-1: 92f05eaeda59b2834428070a240d611d9a8b3217 SHA-256: 7e630f56c69da274acaaeeb7df9a48e00ee5f6aa2541577cdd039fea98a597b8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/123?utm_term=caterpillar+forklift+parts+catalogue PDF link annotation
    • http://wordwild-store.com/mebafimelexerikomk0iy.pdfIn PDF document text
    • https://pemanawawe.weebly.com/uploads/1/3/5/3/135320082/594e0b3f8ad4.pdfIn PDF document text
    • http://nanebaxexob.getenjoyment.net/speed_queen_coin_operated_commercial_washer_price.pdfIn PDF document text
    • https://vafunaparixidi.weebly.com/uploads/1/3/4/6/134627598/rekufelu.pdfIn PDF document text
    • https://buderenedisam.weebly.com/uploads/1/3/5/3/135302361/ramugataviriworuta.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/xuxibupigagedagifuziwun.pdfIn PDF document text
    • http://tipografiyav.moscow/generic_structure_and_language_features_of_procedure_text21zaf.pdfIn PDF document text
    • http://kinemulawaw.sportsontheweb.net/25032840404.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/xapolixu.pdfIn PDF document text
    • http://teren.fun/study_electrical_engineering_online_australiaviurv.pdfIn PDF document text
    • http://uanews.website/32066605410nquh6.pdfIn PDF document text
    • https://devojakosumu.weebly.com/uploads/1/3/5/3/135314674/df7bd1fcf0ee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tejovixija.rf.gd/char_broil_performance_5_burner_assembly.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/kindle_app_not_syncing.pdfIn PDF document text
    • http://zumikatumisi.rf.gd/kenovok.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/adobe_illustrator_templates_free_s.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC915 5152 bytes
SHA-256: 3c3425c9f4658c9c59c671192731da54aef9afcfedc22e2f03a3e5544aed4c5a
font_01_sfnt_off0000daaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAF 10500 bytes
SHA-256: 169b33a7e50082d4f0f4a68ee9f4d261342ab60f13c9bda9b8aec9538c66ea26

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