Malicious PDF — malware analysis report

Static analysis result for SHA-256 86595b226a2dcb7f…

MALICIOUS

PDF

78.4 KB Created: 2021-03-25 01:47:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 193cc3dd9e1add09ccc03b178297631d SHA-1: 210102418cbc56d31805012e9bf535cc16b359f5 SHA-256: 86595b226a2dcb7ff83c4a26c6851d8bc84902985d99a61a92244beec8d6986d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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. 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 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://maypoin.ru/award?keyword=arifureta+shokugyou+de+sekai+saikyou+web+novel+espa%25C3%25B1ol+pdf PDF link annotation
    • https://lirodenagegoket.weebly.com/uploads/1/3/1/4/131437677/zegovebudoxetesexibi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481676/normal_600c1dfb7a04d.pdfIn PDF document text
    • https://rojurunonujimos.weebly.com/uploads/1/3/5/3/135325454/takapidijogilud.pdfIn PDF document text
    • https://gerunujixode.weebly.com/uploads/1/3/1/6/131606408/lotabasekageb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383321/normal_6025c8dc5cc2f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382972/normal_5fec23875cb98.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://girodolud.rf.gd/my_schlage_keypad_lock_just_spins.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/autodesk_vault_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/jirak.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/pedititobofemidedabebabab.pdfIn PDF document text
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_0633858464a449b1b0e7a1ae262d20f3.pdf?index=trueIn PDF document text
    • https://35e1cc1d-5f6c-4a41-9b1b-b9ae8dddc97a.filesusr.com/ugd/351eee_399c333d9f974bb193ca3ac1c12c168e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bebd91d4-5a27-48e5-b71e-acf2e59787bc/77419588685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e90add45-8c86-442c-84fb-f94d93ac1a69/maytag_quiet_series_400_wont_start.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/gixasaxitujejoxememeber.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/disneyland_map_minecraft_download.pdfIn PDF document text
    • https://30372bae-fb3d-4285-bee0-d91e70c22047.filesusr.com/ugd/835091_0557b2a49a404b02abcab6e6e0d17a73.pdf?index=trueIn PDF document text
    • http://roduzafudi.rf.gd/lejabowivazukexonola.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD066 6452 bytes
SHA-256: a742cd62a013a19612a01ac6e42a87368fb56cf10f4f51a8dc91648a138fe739
font_01_sfnt_off0000e699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE699 5960 bytes
SHA-256: cf3d7b27bd9d7e9d5d6d146cbb2c3926942857d63c1c64b676f65a6f0ab9bc5d
font_02_sfnt_off0000fab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB6 19124 bytes
SHA-256: 9d01570fca2c41f3178999eb29479338be790a1c8870b0980830a4520d916ef7

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