Malicious PDF — malware analysis report

Static analysis result for SHA-256 a428aa406b84a006…

MALICIOUS

PDF

71.8 KB Created: 2020-12-19 10:17:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 8c4db17b6231b411537f3424ad2052e4 SHA-1: 7188a6c482f75cce640f1fa46fa9a4b95561d486 SHA-256: a428aa406b84a006ef4c4d5f868d8fd7b078182a756d45b89f6aa725f979d5f0
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The document body, though heavily obfuscated, suggests a lure related to a 'treasure hunt'. The presence of an external URI strongly indicates an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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/strik?utm_term=maroo%2527s+bazaar+hunt+for+ayatan+treasure PDF link annotation
    • https://niwejeru.weebly.com/uploads/1/3/4/3/134308800/riredisupexatikuki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382972/normal_5fc5f555bd191.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404123/normal_5fc8a1de00d9c.pdfIn PDF document text
    • https://silemixijotin.weebly.com/uploads/1/3/4/4/134463531/nadabokebepituta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366346/normal_5fa08fc7c6aea.pdfIn PDF document text
    • https://kexuminuki.weebly.com/uploads/1/3/4/3/134310960/7f82d669f3b2a90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379846/normal_5f95216a81bdb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc390e0f9866f3fd2e4e56d/t/5fc6c6295fecd2174b490fd7/1606862378315/tugadimurawadexisuxam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8ed7da0-d684-4714-8594-8b544f9d0640/piredo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ba64f3c-1926-4a63-890d-14d7c58ea9cc/sadurulodigukopidajaro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cb7ad18-55a2-4a06-9b4f-ce10da71e663/purple_hibiscus_book.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_off0000dbd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD8 5152 bytes
SHA-256: a8ade29b941c739438fbed26bdf307af75d133587b33b50d15e54183619b930c
font_01_sfnt_off0000ed80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED80 11036 bytes
SHA-256: 8f383d7625d0600025a8f9792cdd9c13a42c4fb685ec5bd17041a191d2d84bdd