Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e04b3f6918db83e…

MALICIOUS

PDF

78.8 KB Created: 2021-03-18 13:22:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4ea1552d511514a326a420f31d3155f SHA-1: 9f3eecb23c4ac6a5b3db9a8a6e6211e183bb1ca2 SHA-256: 4e04b3f6918db83e6c6f04dcdbdf3e46a75f0142b1f35fe03fe09320c3ee9eca
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified by the PDF_URI heuristic. The ML classifier and ClamAV detection strongly indicate maliciousness, specifically phishing. The document body, though heavily obfuscated, appears to reference a cinema program, suggesting a lure to trick the user into visiting the malicious URL. No scripts were extracted, but the presence of an external URI is a primary indicator of malicious intent.

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://golowaki.ru/aws?utm_term=program+kino+cinema+mlyny+nitra
    • http://milafikolume.iblogger.org/oklahoma_history_chapter_8_test_answers.pdf
    • https://static.s123-cdn-static.com/uploads/4417658/normal_5ff540b2bba11.pdf
    • http://irisca.online/navy_seals_emblem_on_casketlekr5.pdf
    • https://cdn-cms.f-static.net/uploads/4500893/normal_601a2b44a5fc0.pdf
    • http://neyroskakalka.site/927986872900tiy.pdf
    • http://dofapupore.22web.org/why_does_my_brother_printer_print_blurry.pdf
    • http://italywom.space/how_to_tell_the_age_of_a_concord_furnace3sbol.pdf
    • https://cdn-cms.f-static.net/uploads/4387054/normal_60445deff3d52.pdf
    • http://vabazaf.22web.org/between_the_sheets_lyrics_amy_winehouse.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://vepawipexujobok.epizy.com/88445010711.pdf
    • http://xitagewiz.epizy.com/chacun_a_son_gout.pdf
    • http://jugozuzojo.rf.gd/how_much_does_starbucks_pay_in_el_paso_tx.pdf
    • https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_a40c7722547d49248f7238f7ded878a0.pdf?index=true
    • http://ramasewo.epizy.com/music_without_vocals_audio.pdf
    • http://vumavezes.epizy.com/identification_card_sample_template.pdf
    • http://pogifovemujure.epizy.com/gegugajisajonurufokevude.pdf
    • http://jujadax.rf.gd/mavakixenokofivaxenibi.pdf
    • https://1801fa0f-56e4-4894-8452-b8e06651d4be.filesusr.com/ugd/868401_c79187a2e1524eee8e2d09e0e5bb2e6a.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e485.bin
c0f6040d0d8655e5d0f5bea15935576e90cff6e90f511679a019807bbac41fd9
pdf-font-stream PDF embedded font (sfnt) at offset 0xE485 4896 bytes
font_01_sfnt_off0000f512.bin
507951284edf1d6bc66f8cf1fd837092eca8fc1bd7c76692fe0ef8c21b5388f9
pdf-font-stream PDF embedded font (sfnt) at offset 0xF512 13912 bytes
font_02_sfnt_off00011df9.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF9 4324 bytes