Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3c285e89d05f2f…

MALICIOUS

PDF

77.2 KB Created: 2021-04-20 13:31:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8beb1c325f9d5794b9eb9d9965bb219d SHA-1: 68bd4cdb7def2115d770db82a1f88ff6cff6ecc0 SHA-256: 4e3c285e89d05f2f76da7f2707cda2be8811b4822e1d88643ce5a7415a6b3a78
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one identified as a potential SEO link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious or spam-related websites.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=how+to+plan+development+goals PDF link annotation
    • http://dikagowoxi.sportsontheweb.net/abscesso_cerebral.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414847/normal_5fd26ac344850.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464861/normal_60116089931fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454043/normal_605fa52360410.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://26577e91-18e8-42c3-8e85-49dcca1d6605.filesusr.com/ugd/195787_11ee4f5a4f214de08f6f44de7885cd26.pdf?index=trueIn PDF document text
    • https://17c3d818-7f64-4152-976a-2fa997d7a7be.filesusr.com/ugd/e2c250_2693c5eb6630449aba4af8b5ec220096.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/75e73109-d6e1-4af6-abff-7bfe2811785f/vox_valvetronix_tonelab_se_bedienungsanleitung.pdfIn PDF document text
    • https://ad858f6a-7bbb-416d-9365-e04d7986ed9b.filesusr.com/ugd/3c9ac1_d039c78306ec462a81f68e22f6e8827c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/fanevaleke.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/14698952569.pdfIn PDF document text
    • http://fuvarijes.atwebpages.com/zoziwolef.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/bollywood_hd_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/make_navigation_bar_transparent_android.pdfIn PDF document text
    • https://f8b2de7a-6012-4721-b8f1-df5267d6bb95.filesusr.com/ugd/8ebb60_6bd0800fdb4b4edbbedf0c72cc913155.pdf?index=trueIn PDF document text
    • https://da6a6a96-7907-4aac-bfe3-592928b14ca9.filesusr.com/ugd/39e844_d44220394a944d899e909ff4a69a83c5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccbc86d6-3da2-49fe-8a2a-15d61dc8bb41/lasipo.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/novesugamedukejevizuwon.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/civilization_6_early_game_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/dusaturowemiluwilijakola.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_off0000f02f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02F 5296 bytes
SHA-256: 56cfcf199fa903261af1963e7380a11b833f1d93d65985bf03848247aa31a7f4
font_01_sfnt_off0001023d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023D 11404 bytes
SHA-256: 48e2375f10801acd386ebee130ff125b0f9009df08265b69f03703288d8734f0

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