Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6ea58beb477db32…

MALICIOUS

PDF

71.5 KB Created: 2020-12-17 06:53:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 45d71f20612e8e36d36af779a5328ead SHA-1: 11c295bf612335abac1de4e74eab1f736ca42ad1 SHA-256: f6ea58beb477db32401847110914b15f5ab751eee5e2787045877223e8eb4489
144 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document contains heuristics indicating it is a browser extension/update installation lure, a common social-engineering tactic. It also contains an external URI pointing to a suspicious domain, likely for downloading a payload. ClamAV detection further confirms its malicious nature, identifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/aws?utm_term=android+tablet+emulator+for+pc+free PDF link annotation
    • https://vupubajuxik.weebly.com/uploads/1/3/4/4/134492473/4d62a3.pdfIn PDF document text
    • https://pagofere.weebly.com/uploads/1/3/1/3/131398194/6167660.pdfIn PDF document text
    • https://tolajugim.weebly.com/uploads/1/3/4/6/134647220/4c6f22c063eb.pdfIn PDF document text
    • https://datotizit.weebly.com/uploads/1/3/4/6/134696706/zawes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371808/normal_5fa8c67201a8f.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/7537755b-dbf9-468e-825c-f8ac289aa438/eckert_animal_physiology_5th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d32617a-f40c-4302-9757-0d3ea3880fe0/ios_7_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/go_math_grade_5_chapter_4_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/cs_training_after_executive.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/50944102421.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0fa67fa-8d4d-401d-8f7e-f26af8fe5423/onigiri_leveling_guide.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_off0000dbdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDD 5252 bytes
SHA-256: a904812679ea3777ffa01a038f6ee238179821024bfbea6865b437b214fc3f27
font_01_sfnt_off0000eda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA2 10436 bytes
SHA-256: 296c741cfaf5129176b8034eb36bb8a70645f7bd9f1cfb8908133e6505eae314

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