Malicious PDF — malware analysis report

Static analysis result for SHA-256 5995154eafb68c88…

MALICIOUS

PDF

75.4 KB Created: 2021-02-10 16:57:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f629b42e113fdf4f434277f5d53b47be SHA-1: d8fa77fccf3e76f22c827d380c75dcc98b00d5fc SHA-256: 5995154eafb68c885176d76d69001cfdc850f15e29a90689b0cf27cf1f48e3f5
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and it contains an embedded URI pointing to a suspicious domain. The document body, though heavily obfuscated, suggests a lure related to educational materials, likely intended to trick users into visiting the malicious URL for 'worksheet answers'. No scripts were extracted, but the presence of an external URI and the phishing detection strongly indicate a phishing attack pattern.

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/123?utm_term=gustar+and+similar+verbs+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370080/normal_6019b4bcdd0d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426828/normal_5fd30ca6045ad.pdfIn PDF document text
    • http://belldiscount.ru/pokogalexepekufipoboparpyc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482009/normal_600d556fc8225.pdfIn PDF document text
    • https://cdn.sqhk.co/xipepovivik/y7geHVT/zemulewalixafenosos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451574/normal_600c019c8b33b.pdfIn PDF document text
    • https://cdn.sqhk.co/tokebamojos/biggdie/reversibility_principle_environment.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386365/normal_5fd3be4d66662.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407066/normal_5fcb4f0a8cde9.pdfIn PDF document text
    • https://cdn.sqhk.co/jiledexuda/QMAijpf/11309620201.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/CZoqUgi/jiomeet_app_download_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_60110fc358513.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/gomakobez/wutoxosuwazij.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/bovuzosivokorar.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/job_inquiry_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/96286806848.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/9446875980.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/cambridge_checkpoint_science_textbook_1_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/vemowok.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_off0000e789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE789 5452 bytes
SHA-256: 7d1e9b44c60736bdd356eee63595346874bc6930083ff09a832783dd8ae71d9b
font_01_sfnt_off0000f9fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FC 11664 bytes
SHA-256: 00016385aa99d616b43fd57682d54b56371338b4b4c167251a2b7c2537c044fb

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