Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b8eacef7c4e5885…

MALICIOUS

PDF

66.5 KB Created: 2021-06-11 20:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0410b61ef4838a5c9d13072e5325e277 SHA-1: 56269f86a9ae6334af20ac29d8d1feca3838c19c SHA-256: 7b8eacef7c4e5885b6508c8a08a70223792bf1c6956d5379f6cd97d28db94222
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a phishing or malware distribution site. The document body, though heavily obfuscated, appears to reference academic information, suggesting a lure for credential harvesting or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/123?utm_term=dr+bhimrao+ambedkar+university+agra+date+sheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370072/normal_5fdd492ec3183.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369316/normal_60291a679d8ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477156/normal_5fed5840d16b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370777/normal_5ff7f7d8577be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381347/normal_5fe4693b93235.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461498/normal_6065c06be9dd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375351/normal_60bdea2c7ad25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411935/normal_605ac2bcd7990.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491688/normal_6033d32425f0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426701/normal_5ff5ec461987a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_6026ac9f5de02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_6046bb1054041.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371240/normal_600ff2e531f02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477863/normal_5fd9926e898d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369912/normal_5ff76fc39f728.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408881/normal_5fd33b274b608.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4448550/normal_60b209fbb2afe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380079/normal_6029a8e19e025.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471992/normal_6032a22c6493b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366958/normal_5ffd4a644fd45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458428/normal_6025fb3b4a14b.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4486042/normal_60b4a9ce584b3.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_off0000c768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC768 5572 bytes
SHA-256: 1a8e58f02cb8485f70d5a6d631b3e6473bd592e4ce26ed17991df3505900a7dd
font_01_sfnt_off0000da37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA37 10012 bytes
SHA-256: e9ccd6f16702488f50a463cc637506836c8cc9d1c714d6b55396fdea69b9823f

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