Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fa733587b968370…

MALICIOUS

PDF

66.9 KB Created: 2020-12-10 01:40:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0a5ccd97627a246a882346dbaa94fef7 SHA-1: 983fda30f9a7f2a9898c89a2919cb69c6aef1ad9 SHA-256: 0fa733587b9683704ef992ae23f051cd87b0b50e23004e9bd6cbd5ec9478b8f4
194 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. It uses a fake browser/software-install lure. 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 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
  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=drayton+public+school+staff In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384299/normal_5f9649d0ec72d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470408/normal_5fbd63e267cfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380882/normal_5fb4b2ae59790.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466664/normal_5fb3fbf5cec3d.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/pexodugosa/unchained_melody_piano_sheet_music.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1d3b3f9866f3fd2dadad4/t/5fc3eccd4f9837572058cb1f/1606675662484/bungou_stray_dogs_dead_apple.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f6e9ea4a794d56455deb/t/5fc513c2e6d49a06bb33a095/1606751171479/rodujokimuxupogepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9224c319-609f-4822-a99a-7d5a19165c26/72604486296.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4e20c8ef7301f8b2a786d/t/5fcedd6bba7003536e9b2763/1607392621489/dream_house_days_money_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a999c14dfd36fe120027/t/5fc98e51acaba3173456b31d/1607044690117/rijitidovevamopazibifusov.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc007006609fd0ee78c7004/t/5fc33516f8cdb769c64badd1/1606628630835/42790394573.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0028ac14dfd36feec75cc/t/5fc1863f3c6ccf69f397bbd7/1606518336430/17433763269.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/sosen.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc56f7ad49dd1244752cb4c/t/5fc6c7c8b2fa4660c8beb284/1606862792122/sufagik.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57e0612facd59cecc162a/t/5fcfbc3ce04ae82564b38b55/1607449670054/41214206761.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_off0000c5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5BF 5344 bytes
SHA-256: dfc2fb742130357d5b4510c79247f47280b37f578f65ee15dc4c4db000b12168
font_01_sfnt_off0000d7ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7ED 11720 bytes
SHA-256: 2345126c7af138b89f61fe6ee857bd2b674eb80fd75dfb5d7d54886ba9d3dd74

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