Malicious PDF — malware analysis report

Static analysis result for SHA-256 6836536be50564b7…

MALICIOUS

PDF

70.0 KB Created: 2021-03-25 04:56:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 916453086d23c97767d11d2579be9240 SHA-1: 50fde3ec8f9136683c648fd9ab475ec55146d8bf SHA-256: 6836536be50564b76e11f202a611f46a270e4092d3a3cc8094113119a656435b
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf and includes a URL related to pregnancy health. This URL, along with several other unknown-reputation URLs extracted from the document, likely serves as the lure for a phishing attempt or a redirect to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/aws?utm_term=what+does+high+blood+pressure+in+late+pregnancy+mean
    • http://tiktokfrance.fun/metabideditefadu6801t.pdf
    • http://dizejujiw.iblogger.org/viwokoxazapogiri.pdf
    • http://jatamonip.iblogger.org/angara_film_hd.pdf
    • http://kinokaiff.space/man_in_the_high_castle_season_2_ending_reddit3d2ya.pdf
    • https://static.s123-cdn-static.com/uploads/4501229/normal_5fcd099578a99.pdf
    • https://cdn-cms.f-static.net/uploads/4464707/normal_603b6a616ccbe.pdf
    • http://burrrhey.tech/lonusivalemudotubalurakeoqgzh.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/41a29ca9-617f-439f-8876-b8f802b29242/garmin_gpsmap_62s_instructions.pdf
    • https://uploads.strikinglycdn.com/files/1b104539-4809-4ba8-b711-73aab5aaebf5/states_of_matter_reading_passages_2nd_grade.pdf
    • http://gegumapobok.rf.gd/rifosuwebe.pdf
    • http://vaxinot.epizy.com/comederos_y_bebederos_para_gallinas.pdf
    • https://uploads.strikinglycdn.com/files/356dc42f-e107-4bbf-84d8-a04c5db2b244/power_book_ii_episode_3_cast.pdf
    • http://pomedunud.epizy.com/moxujopozozikopozuxaxegok.pdf
    • https://uploads.strikinglycdn.com/files/81cc2987-e84c-43fc-b17b-f657fe531949/jenetenede.pdf
    • https://uploads.strikinglycdn.com/files/68f99332-7b61-48d3-ade0-d91d36fcc5f6/wirexogukuminufatufinur.pdf
    • http://xezinupuwe.epizy.com/a_g_gardiner_biography.pdf
    • http://firasakujataj.epizy.com/16040862425.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3d4.bin
c7c82191c1d3b263cb740e209ff641989ae91e8eb0f23eb40919d043c1837883		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D4 5744 bytes
font_01_sfnt_off0000e74b.bin
a460713b58f25266115b338893a0d25bf963f866f6986e44b8ba27c32aa4418d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE74B 10408 bytes

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