Malicious PDF — malware analysis report

Static analysis result for SHA-256 b95ca95a08b9db72…

MALICIOUS

PDF

69.8 KB Created: 2021-02-25 17:52:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 11947c17a856c4cb615588b9c61dd9a4 SHA-1: f7d34e55767b2b5476f7e270dcfb66a37fd8b18c SHA-256: b95ca95a08b9db72134fc46fb2af0304b2ca3e74a0190e28983291d51c1ffa2c
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically identified as an external URI pointing to a suspicious domain. The document body, though heavily obfuscated, suggests a lure related to 'brainpop neurons worksheet answers', likely intended to trick users into visiting the linked sites for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=brainpop+neurons+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/salobosemiv/cYhjXd8/jomagato.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384152/normal_602f404fdb233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493602/normal_6012552e15d4d.pdfIn PDF document text
    • https://cdn.sqhk.co/jidulopavoji/AWijgcj/4387285568.pdfIn PDF document text
    • https://buronoveze.weebly.com/uploads/1/3/0/7/130739674/701054.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494657/normal_602d65b42fa3b.pdfIn PDF document text
    • https://cdn.sqhk.co/sewiboveso/fxghAha/cytosine_pairs_with.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/hd49r0w/gedok.pdfIn PDF document text
    • https://cdn.sqhk.co/suxunuke/djfTjcU/9539103941.pdfIn PDF document text
    • https://jabizujosewej.weebly.com/uploads/1/3/4/5/134584717/tagunuseranifirinuxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389370/normal_5fddff9167f2d.pdfIn PDF document text
    • https://wezenazuzive.weebly.com/uploads/1/3/4/7/134764498/jagos.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/Aujhej3/97225170918.pdfIn PDF document text
    • https://cdn.sqhk.co/zibomevuguli/Ohhijv4/divupifekeg.pdfIn PDF document text
    • https://jupojunidukeze.weebly.com/uploads/1/3/4/0/134012404/zosexarebifibom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366622/normal_5fd26bfaf2d4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_6026229dbea7a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53F 5080 bytes
SHA-256: 037840223f73ac5f4085d6ad32520363e2783a37c40b961455729223698c6577
font_01_sfnt_off0000e694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE694 10292 bytes
SHA-256: 9f2831ce8cbd127b51cd5dfcc2f6aac801dd9834ffcca6fad63263981b146192

Open this report in the interactive analyzer, or submit your own file for analysis.