Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae6cb7c02d6e878e…

MALICIOUS

PDF

63.5 KB Created: 2020-12-15 00:41:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4c45a35dbe37cb8352b8e0c3edc24034 SHA-1: 6e32064911a311106e440ce287eccc7f0644067f SHA-256: ae6cb7c02d6e878e2b4f289959f0858eebc706409f87c2aeb80c33ecd5673cfa
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=words+starting+with+ph In PDF document text
    • https://cdn-cms.f-static.net/uploads/4427811/normal_5fabe02fbc611.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458137/normal_5fc8795542b05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389127/normal_5f980f3cb4415.pdfIn PDF document text
    • https://pebawozo.weebly.com/uploads/1/3/4/8/134865175/votigetibema-jiruforuxinute.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493600/normal_5fc337ed16371.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5f906b51c99e3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/937dbdc3-98c0-4535-9d46-9d4e60ba7fc7/xiludisukamolesodure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a28605f-70ee-4349-ae4c-f5af75bc0f1d/nivel_de_significancia_estadistica.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/30138575765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5f2ea9e-adaf-4ad7-beee-9af65136fdbb/els_grammar_book.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7116deddbb05c68931a73/t/5fc9824e4e3f3d251731fa1a/1607041615943/teddy_bridgewater_vikings_stats.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc537035bcb0228a29ec055/t/5fd65fc83ebe0416315f7e79/1607884744782/47672073.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4402f0d-ec01-4cda-a4b1-53169577af33/rumekoxonufefedanab.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b45c9698b02c7f418c6b/t/5fd1d1a1ebc7ce75e8b33081/1607586209816/vupogivejowakigerotipa.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_off0000bb10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB10 5296 bytes
SHA-256: 9813985c348d6f66d9506a7e9b8ba0f48fbefa701379adbef7c5aafe012cfe9a
font_01_sfnt_off0000cd26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD26 11032 bytes
SHA-256: 426f90e4979827e5c74bacf5e8cba27fa58a193d54bc69b23108410a4c45194e

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