Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4a2a862505b49b9…

MALICIOUS

PDF

70.8 KB Created: 2020-12-31 04:13:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9e293b4535e35b39a396b351f4742822 SHA-1: cdea73eb6813a9ba707f7aaccd4b9d144e87d010 SHA-256: e4a2a862505b49b9a5711ce78c0ee3ef1628fe344bbce97c1f17ff3e8a0a9f53
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or phishing page. The document body, though heavily obfuscated, contains strings related to server names and SQL, suggesting a lure for technical or administrative users.

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://trafffe.ru/wb?keyword=my%20server%20name%20sql PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4372723/normal_5fc82635cff80.pdfIn PDF document text
    • https://cdn.sqhk.co/peferitukofa/ihdsijZ/jimititepib.pdfIn PDF document text
    • https://cdn.sqhk.co/vakamuzawa/bihiejf/21502669265.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454429/normal_5fa0df56ec87f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384142/normal_5fd63afc1358d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379385/normal_5f8cef57f16c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375887/normal_5fe9e28595534.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377403/normal_5fc80ee9906a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420924/normal_5f9f0ee1885e2.pdfIn PDF document text
    • https://cdn.sqhk.co/monasomeb/iimiiwF/download_zombie_age_2_mod_apk_latest_version.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417535/normal_5fe05ae708392.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365536/normal_5fdefcf457781.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/zuxadol/12915403997.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/788ed54a-b045-49b1-b313-841ad6fbc7f6/holmes_fan_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/barijenanox.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_off0000d54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54A 5124 bytes
SHA-256: f1b83d0b03b2fb3c50ce2d936f41ac8f50430b6452b28b86fc54b98925aaeaca
font_01_sfnt_off0000e6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BE 12136 bytes
SHA-256: 976937157078d17a89e3e7143e1f26d985f302aad6f515d6cbfa7d66f0054940