Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dc2febe7276db91…

MALICIOUS

PDF

80.0 KB Created: 2021-03-22 06:01:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d6458b1c1dde73cc63745ffe83f3a198 SHA-1: 5ab37c7141572d18e65a0fe380181b2e398cf8d9 SHA-256: 2dc2febe7276db91bf8b0ca4cb7e7e427ad68495cb6bf559c9164d51bbb7b6a9
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical detection score. It contains an embedded URI pointing to a suspicious domain, which is likely used to host a phishing page or deliver a second-stage payload. The document body, though heavily obfuscated, suggests a lure related to academic sampling methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/award?keyword=advantages+and+disadvantages+of+probability+and+non+probability+sampling+pdf PDF link annotation
    • https://cdn.sqhk.co/xagogudexo/hfif7jf/kajugugejutol.pdfIn PDF document text
    • https://cdn.sqhk.co/gopefovepagi/jNjbiem/8680667760.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412757/normal_600b97d9599de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384642/normal_5fc8985e60e98.pdfIn PDF document text
    • https://cdn.sqhk.co/kikepedu/EUhfujf/okay_boomer_lyrics_senzawa.pdfIn PDF document text
    • https://cdn.sqhk.co/ramawuvade/3GhiTgV/97911982339.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420776/normal_5fe8911d99fb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485587/normal_600ab9b9ee189.pdfIn PDF document text
    • https://cdn.sqhk.co/migixurej/idhgiaR/15466072109.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411691/normal_6049d5f6310b4.pdfIn PDF document text
    • https://cdn.sqhk.co/sabumijobude/IgghEwa/tiponusepozowotevo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392649/normal_603c3cfb86955.pdfIn PDF document text
    • https://cdn.sqhk.co/nilimijano/gfwBehd/65723933496.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/bjyHQAt/26795995507.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374843/normal_6029395262340.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://s3.amazonaws.com/babetafaperaxov/manisamiruwewerutis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06b3967e-1ada-491c-af74-a51619724f8a/wimonawuwujali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/215e198c-0440-405d-ad9d-481e838d25ed/who_goes_there_john_campbell_text.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/sejitubolowotuxi.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/21308480197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3714708a-6e53-4975-8c6e-32c8290d612c/mexowinazojaxaf.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/anjali_movie_songs_2019.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_off0000ee07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE07 5440 bytes
SHA-256: bc275f4f593943f696e5fdc87314509dda7d3f56280f4d6e5d4040307c1ae6d0
font_01_sfnt_off00010078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10078 10312 bytes
SHA-256: c467e18c0a02f188bb653505f57d1ca59e6fbda5d3b8bc6c8e6e937fd243b61a
font_02_sfnt_off000123ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123AB 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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