Malicious PDF — malware analysis report

Static analysis result for SHA-256 0edf23ea5fad6299…

MALICIOUS

PDF

67.0 KB Created: 2021-03-17 09:34:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a633fb22e9f055ed6a420aa49093fc05 SHA-1: 783ff57263d2c2bdb53b82aea9c80e7c5bf2c559 SHA-256: 0edf23ea5fad6299949b9c45f0d5761dae975ebaf987541c7abe9e9732f615b3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, disguised as an 'Allianz health insurance claim form'. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into navigating to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/award?keyword=allianz+health+insurance+claim+form+pdf
    • https://static.s123-cdn-static.com/uploads/4387589/normal_6004779e6545e.pdf
    • http://ravovenovibu.medianewsonline.com/the_communist_manifesto_book_pages.pdf
    • http://saroforati.medianewsonline.com/bapodisonakin.pdf
    • https://cdn-cms.f-static.net/uploads/4501514/normal_604b3946d986c.pdf
    • https://cdn-cms.f-static.net/uploads/4387582/normal_6040ec494a228.pdf
    • https://static.s123-cdn-static.com/uploads/4368219/normal_5ffebfe66ea34.pdf
    • http://laulu-go.ru/gizupotasirifap40jqj.pdf
    • https://cdn-cms.f-static.net/uploads/4386830/normal_602bea9ee147b.pdf
    • https://cdn-cms.f-static.net/uploads/4402938/normal_60314d9d89f2d.pdf
    • http://wizapivizesib.mygamesonline.org/antony_and_cleopatra_summary_download.pdf
    • http://qunit.space/6725316572693s89.pdf
    • http://swast-group.website/blacksmithing_guide_classicbpjh7.pdf
    • https://cdn-cms.f-static.net/uploads/4472788/normal_6050c71eacb89.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gafodix.myartsonline.com/carrier_weathermaker_9200_will_not_ignite.pdf
    • https://uploads.strikinglycdn.com/files/4978596a-ed0a-49fa-a9f6-bddd90b905dd/55792959624.pdf
    • https://s3.amazonaws.com/godewumazek/64329526558.pdf
    • https://s3.amazonaws.com/taguxif/cv_template_design_freepik.pdf
    • https://s3.amazonaws.com/debiwelof/garmin_2555lmt_price.pdf
    • https://uploads.strikinglycdn.com/files/be20a36b-4d02-4210-918b-7d4f6f1b39ea/how_does_apneic_oxygenation_work.pdf
    • https://uploads.strikinglycdn.com/files/7bebb192-9b69-498a-8ab0-a2be3a9aabf8/narawobopa.pdf
    • https://s3.amazonaws.com/zagapaxa/zozotesapasi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cae0.bin
6505c42e0a2de2e8b349bf8dec05241d669499e230b85b94e8bbb043290902ed
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE0 5432 bytes
font_01_sfnt_off0000dd37.bin
1bf1f3263032dd8c7245d105afdddecc6a6098397e139535ff978cbe17871300
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD37 9824 bytes