Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1212b9051c1d9ba…

MALICIOUS

PDF

69.6 KB Created: 2020-12-13 14:47:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ab389a23fcbe7402fd6892c0e1081c09 SHA-1: db0322bc6a44bf678d88faff0cd1bb228c6cf97a SHA-256: f1212b9051c1d9ba71012e375bd58a02fd4cffb0b7eefd5f57e0fe8176dd93fc
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 0.9995

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://gettraff.ru/123?utm_term=kingroot+apk+free+download+english+version+for+pc In PDF document text
    • https://letenusesek.weebly.com/uploads/1/3/4/3/134310332/vefaj.pdfIn PDF document text
    • https://vegirizixe.weebly.com/uploads/1/3/4/7/134716682/jojuxugabi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f88cbef8f21d.pdfIn PDF document text
    • https://pamuguvijokogag.weebly.com/uploads/1/3/4/8/134883264/lidilekew-jiwakelevemi.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://s3.amazonaws.com/pulujolatepuv/mastering_chemistry_homework_answers_chapter_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/568727b4-7511-4850-a090-6fd887710710/39661345501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21e756d8-524b-44fe-bb17-9e948f9caf82/68797833520.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc552cfab79f442f246e6cc/t/5fcf96decd9a2056ff7cc59e/1607440099785/crazy_climber_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/053eee55-cbe5-495a-87e2-8b13f53efac9/92277560864.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce14e48eda244dc4ab56df/t/5fcfda3d13cd4c5f7494221c/1607457342299/ice_cream_flavors_list.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_off0000c587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC587 5388 bytes
SHA-256: 770924d1cd5a94b253064ec1b3ae59895ce1a0380369fa9df80edb289146a71b
font_01_sfnt_off0000d7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E8 10468 bytes
SHA-256: 224c849c782d882db74f74e1205d100289492435524888c16236aaf30c5079c2
font_02_sfnt_off0000fba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA3 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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