Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcd048f612ed0be9…

MALICIOUS

PDF

69.9 KB Created: 2021-02-26 19:41:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 3a19d06c11c99fb732110e905b7c6f76 SHA-1: 76628364b6e1ec92f5690feba8c45dd35848500c SHA-256: bcd048f612ed0be98bbb88bfe1d3a7507f8597c95d167ccf40aae6c9552ebc1e
96 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a high-confidence ML classifier and ClamAV detection. The embedded URL points to a domain associated with phishing lures, specifically mentioning 'Avast premier activation code reddit', suggesting a scam or credential harvesting attempt. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic indicate malicious intent, likely involving the execution of embedded JavaScript or redirection to malicious sites.

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://jacksth.ru/wix?keyword=avast+premier+activation+code+reddit PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4477886/normal_5ff4ead03f976.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403537/normal_601976484cf6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479236/normal_5fec7b95e2da3.pdfIn PDF document text
    • http://potaberukogox.66ghz.com/petupuxib.pdfIn PDF document text
    • http://akfb.online/sutabaxilabibamrxylv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374024/normal_5fe4e87b17165.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369909/normal_5fcf7283a2c30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371508/normal_6035506e8e257.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456687/normal_5fc8adabefbf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489846/normal_60386ea415d2c.pdfIn PDF document text
    • http://kino-vezde.ru/scary_movie_amazon_prime_videoxhcnb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453550/normal_5ff9ed2a7cca8.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/zurovajij/86987137828.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/itunes_mirror_site.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/conley_injury_report.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/celestite_mineral_information.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_off0000d705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD705 5236 bytes
SHA-256: 575c91328c2ef94e595e0497bc4d6dc07e5d0138039a0cbda8a5f7526a310473
font_01_sfnt_off0000e8c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C2 9972 bytes
SHA-256: 72a4038ee13224ad890e49cc669d3b208e6b61353a75abc2c5bc2acb00d206bd

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