Malicious PDF — malware analysis report

Static analysis result for SHA-256 34044e0538ce45ae…

MALICIOUS

PDF

75.2 KB Created: 2021-03-22 00:09:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2d70463275bb429fa48a678db3666d6 SHA-1: 2196f31456c69809173f0047fb8a039373cb60ce SHA-256: 34044e0538ce45ae32840f52c24eed1edbefe625075f5891eb59d0b83b17c999
96 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded URLs, one of which is flagged as malicious. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains strings related to programming and date formats, suggesting a lure to disguise the malicious nature of the embedded links.

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://ponafet.ru/123?utm_term=vb6+date+format+dd%252F+mm%252F+yyyy
    • http://lojuxaga.mywebcommunity.org/ssc_result_2020_dhaka_board_download.pdf
    • https://vijisazegogufob.weebly.com/uploads/1/3/1/3/131380966/f2e1b32a3c8.pdf
    • http://neridofufuleteg.scienceontheweb.net/83953408028.pdf
    • http://niluwipewuxasa.medianewsonline.com/astron_power_supply_circuit.pdf
    • http://miwasigal.mywebcommunity.org/thoughts_are_things_poem.pdf
    • http://pexosoduriku.iblogger.org/corporate_finance_berk_demarzo_solutions_manual.pdf
    • http://somubuzesixuwun.getenjoyment.net/wozale.pdf
    • http://duzusedolatepe.mypressonline.com/70344442931.pdf
    • https://pexasuwen.weebly.com/uploads/1/3/4/5/134593650/5586334.pdf
    • http://mojadejazisapa.sportsontheweb.net/how_much_is_a_pole_vault_pole.pdf
    • https://wanalepawipetep.weebly.com/uploads/1/3/1/8/131857983/d54bf8542.pdf
    • http://gosugas.getenjoyment.net/kuxedifikub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e942959e-95af-4115-ab05-a6e38533eaad.filesusr.com/ugd/66f7a0_f23f9fba106d49f38162d66ed2af4a4b.pdf?index=true
    • http://kubumoran.rf.gd/bible_promises_apk_free.pdf
    • http://vusanaxipunuli.rf.gd/aptitudes_sobresalientes_sep.pdf
    • https://200c4c3d-185b-4246-b99f-f40cd7065c99.filesusr.com/ugd/3ed902_266267f079894940bfc09bbe9aba5134.pdf?index=true
    • http://zinezalidoratov.rf.gd/nie_boska_komedia_streszczenie_szczegowe.pdf
    • http://kubusefot.epizy.com/kalnirnay_2020_marathi_calendar_download.pdf
    • https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_edae8763e1d04f4097d9fb506ed7baca.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e66b.bin
9840ef18ccb3e85ccac35622bc331d73633e8483512c6cbe75995d2ac9076863		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE66B 5240 bytes
font_01_sfnt_off0000f83f.bin
32549d12fc127cc114a7975f1d438ee069e0150371421134249ee73c1a0857e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF83F 11152 bytes

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