Malicious PDF — malware analysis report

Static analysis result for SHA-256 b882159955ed275b…

MALICIOUS

PDF

71.7 KB Created: 2020-12-19 11:49:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: e868f7c9b57463bc330dbb030877adc3 SHA-1: ed81ce5bacc85b053ba7d1c4f52c62c4f922a697 SHA-256: b882159955ed275be231fdb92ec25413570298554a90b40b455d9eace60ef486
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to educational exercises.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/aws?utm_term=adjectives+and+adverbs+exercises+with+answers+doc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486053/normal_5fb90a65440fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375890/normal_5fda69a54ab35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368481/normal_5fa66e0cd5123.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470837/normal_5fdc66293687e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc013b624b06a7eb3fa8a9b/t/5fc0edcb18e72e5fdbf90d8a/1606479319425/powelukedubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67488360-446f-4113-a38e-bee11fb9ebe1/15801763935.pdfIn PDF document text
    • https://s3.amazonaws.com/zokokamu/pajonafoda.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/wejep.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc12bef2cf09257bd6dc3ad/t/5fc9014c7fb3310a3626abcb/1607008589377/44245058203.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/50949733524.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8798abc3-9d9f-47cc-bdc4-e78c356ab820/vifafosepetijeraxo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc598d9c89e1c4b8fde8ecc/t/5fcb6f889d29b56e4d020479/1607167880706/41543026804.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5597d40f1034a5cc674bd/t/5fc6619c4f98375720b92dc2/1606836636625/bajolu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF9 5208 bytes
SHA-256: 78cc771d63b26a383cfe8d8d4b1c54d45fa3b9d15afbc0c24735b2178b48ef06
font_01_sfnt_off0000e0b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B2 10116 bytes
SHA-256: 2aaeaf5f1f39f5bc0b477ef78e4d629d7f8c16f15289198d560c2137517bdff4
font_02_sfnt_off00010360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10360 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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