Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc85fe51d20661d8…

MALICIOUS

PDF

69.9 KB Created: 2021-05-12 09:04:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f82c38f3b356bf19e937de0414a0ce49 SHA-1: f7ea04d9b7d3455dcd711015637ecca23b744844 SHA-256: cc85fe51d20661d87cd5942adc58d2d58c86ee37abdb40d8896e5df67ae7187e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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://botokaw.ru/strik?utm_term=jack+and+the+beanstalk+story+pics PDF link annotation
    • http://kazexajisodibu.medianewsonline.com/31405672574.pdfIn PDF document text
    • http://fizarumokugafu.mywebcommunity.org/14696014893.pdfIn PDF document text
    • http://vojemodipu.sportsontheweb.net/the_blind_assassin_essay_topics.pdfIn PDF document text
    • http://xebubux.sportsontheweb.net/19055238551.pdfIn PDF document text
    • http://baderezu.scienceontheweb.net/vodadutufebexomozolad.pdfIn PDF document text
    • http://tiluvopira.medianewsonline.com/22272413913.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/39745346014.pdfIn PDF document text
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_636920f08f69419f9177c32627c56ece.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/my_grandmothers_house_lesson_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1ed0b05-c06c-4e7c-85ef-be6819746f05/technical_analysis_of_the_financial_markets_free_course.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/57702446284.pdfIn PDF document text
    • https://9f5bcc56-a059-4f00-ae85-604acd6a3d2d.filesusr.com/ugd/ac9354_8a8000f04e0644cda7c3e9fe89f86c7b.pdf?index=trueIn PDF document text
    • https://123949be-7110-4ba3-a240-a7df06fb38ce.filesusr.com/ugd/80fd5d_02d312e0237540069c62c651e7a76849.pdf?index=trueIn PDF document text
    • https://a86a6b26-b473-4b55-b9aa-7628a2bff077.filesusr.com/ugd/4f270c_648c77322baf4394b155401589ee7783.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cda95a2a-763b-4106-9699-cf4696c5107a/keliwanatave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96796650-5738-4b7c-bd0f-39d08e8bdda3/44118761653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/759a2b89-9cc7-4ec2-a1db-477c8a4b40a5/81541282513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b2ac5a6-a725-49c4-b86e-b85aa79eb3f7/xoditatenekalubigeterile.pdfIn PDF document text
    • https://92fa68c6-d088-48c5-94d9-776fe0504fc0.filesusr.com/ugd/5a053b_4f3a077d76f9457693a7fa637f0f5549.pdf?index=trueIn PDF document text
    • https://3ae4d138-4ba3-4962-98fb-1b98b40a6a82.filesusr.com/ugd/38062a_952406384cd4439b8bcae444b4290d6e.pdf?index=trueIn 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_off0000d2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A7 5456 bytes
SHA-256: 4a5206c0218b08573dfa782815e93acebf92794353c62ce2e059e9492e59b4d2
font_01_sfnt_off0000e52b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52B 10684 bytes
SHA-256: 2e7452ed091caed2878b44371cc90455a26c72db95c2b805c01ad6590f72743b

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