Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec341548f6e85331…

MALICIOUS

PDF

69.3 KB Created: 2020-11-18 01:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3c3c1689b24704e905671586ce3642bb SHA-1: 92ff547e0e4afbefeaa43e68ef4671e6e6f77c46 SHA-256: ec341548f6e85331adf6dd4b20d083529d4acfd3d47c8ba5b94a1b6587ba7e9b
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/aws?utm_term=older+car+value+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375361/normal_5fa8e12874429.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403404/normal_5f9809cf56e41.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
    • https://uploads.strikinglycdn.com/files/c7a29de2-10b7-4049-a63f-d3079995290b/nubodabamobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61205169-a032-497d-8957-ee8e40d31f03/17234253440.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/maxapuwefotajogosoxesok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e499fd7-d4c8-4623-9886-5efc792d60b6/24975034334.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/zeguzejegapuzu.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/despicable_me_1_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/spider_man_homecoming_123movies_4k.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0716b7d8-ef36-493a-87c5-661d213c366f/related_rates_problems_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/redidevadudogokabiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/351d5e6a-c5af-4617-9818-fd2b916ad452/sederegowetefo.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/lonakunebunenenololasujuf.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_off0000c6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6DF 4600 bytes
SHA-256: 912f523f5b84c52d53b7d43e18e7c3c09a16c4bb7dc2cc74a4311e44f4294aac
font_01_sfnt_off0000d697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD697 10560 bytes
SHA-256: 90e3a037c3c101f46c0126158de8c4c0aa9a1f28e81ff61212db3c306e2d79a4
font_02_sfnt_off0000fab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB9 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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