Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc2ac17388f5634f…

MALICIOUS

PDF

67.5 KB Created: 2021-02-04 01:42:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4c702f6706221a2f276ff225532cae46 SHA-1: db6c54fba809e62836efa5a0ad57bb95e52b0b37 SHA-256: bc2ac17388f5634f74a8ef28f77ab4d2120d0ecba25067005ba7f87f922ed069
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. The presence of external URIs, specifically `https://seumenha.ru/123?utm_term=flip+flop+pdf+in+hindi`, suggests a phishing or malware distribution lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a spearphishing attachment 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://seumenha.ru/123?utm_term=flip+flop+pdf+in+hindi PDF link annotation
    • https://cdn.sqhk.co/patemugimej/eOadjgc/download_for_pc_windows_10_free.pdfIn PDF document text
    • https://cdn.sqhk.co/sepagumal/gh7VxOC/65151861287.pdfIn PDF document text
    • http://bestunew.xyz/wedding_salon_of_manhasset_reviews5vukg.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/YsfMkJC/gemilizevoxusimikaresoni.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371808/normal_5fd09931573ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464541/normal_5fcbab0761545.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485572/normal_5fe89f0bbc0dd.pdfIn PDF document text
    • http://buzifun.22web.org/40833837617.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/RhiAggj/4516525368.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445750/normal_5fc6fe972e6fc.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/bogeguva/we_are_the_reason_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/65009843309.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/59482674344.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/zerisopowabebajeg.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_off0000cefd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEFD 4600 bytes
SHA-256: 73cf7005df7871ce0de805d81d71ad77c13496209a2929bba625dcd264b42672
font_01_sfnt_off0000dea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA9 10228 bytes
SHA-256: 440cf12b56ad53589e98f41d47dae32128d3c63c5eb22a3233d2788c1860292e