Malicious PDF — malware analysis report

Static analysis result for SHA-256 d98f931bebbdb005…

MALICIOUS

PDF

73.6 KB Created: 2020-12-21 11:58:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f51fb6239d2b2b63a87ac1b9121601e3 SHA-1: d390541c4029880a8e8c80615a959f97894bf985 SHA-256: d98f931bebbdb005f03665cdf9783c88f391d81c42120594358000502df92d22
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://traffmen.ru/strik?utm_term=brave+fighter+demon+revenge+uptodown In PDF document text
    • https://cdn-cms.f-static.net/uploads/4478146/normal_5faee57c7fd99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382618/normal_5f8d23e93071b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370309/normal_5fc1bf93cdc85.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366020/normal_5fc3b3daeeb08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387817/normal_5fa6eb8493a43.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/wibedubosateg/chicago_manual_of_style_bibliography_no_author.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44cee2f7-aede-4a05-8662-d2451bcbb20f/mass_effect_3_endings_ems.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc557cb3398ff75154b585a/t/5fd1a78ece71ee580fa7fb2c/1607575438934/66293267611.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbcba213-f7a2-4864-8b4b-b83ee5d74f9f/92884957972.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc123632e537a05ef0a8a98/t/5fd1f9a1880fa23343d861c7/1607596449565/animal_crossing_pocket_camp_gift_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2cae0c30a162e0c5ec24a/t/5fcf0d027c36362741a6ecba/1607404803833/xyron_sticker_maker_refill_amazon.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2de36a5bc066edfb2733d/t/5fc38cef3f75b16643421cfb/1606651120055/82217717029.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD1E 5448 bytes
SHA-256: 9a4a8b4845843d762d4b5dce2c30500e188e35830967dda8f7d7ded5683fd645
font_01_sfnt_off0000df95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF95 10692 bytes
SHA-256: f5cc77e7db47662c4f63294ba04f088123eabdf519a49a9a4950dea8378bbd53
font_02_sfnt_off00010488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10488 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073

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