Malicious PDF — malware analysis report

Static analysis result for SHA-256 26523fe3b89fe1e0…

MALICIOUS

PDF

114.7 KB Created: 2021-04-08 05:27:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba250fe064ae1b471c0f50c3582585b7 SHA-1: 27ddb33f6b54e6cec82f9a2f25b39b2ca549a8ba SHA-256: 26523fe3b89fe1e0f62ff77be1dc18dfc36f6de5a4b8d21fbb4c548abb10f199
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://vilenefex.ru/123?utm_term=mac+os+for+macbook+pro+2009', suggesting a phishing attempt to lure users to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://vilenefex.ru/123?utm_term=mac+os+for+macbook+pro+2009
    • http://nitanupemil.mygamesonline.org/kivisubasikelo.pdf
    • http://puvepum.getenjoyment.net/adeste_fideles_spartito_coro_4_voci.pdf
    • http://samokex.sportsontheweb.net/96906006494.pdf
    • http://waliduv.mypressonline.com/maven_tutorial_with_eclipse.pdf
    • http://rejemezurufoveg.mywebcommunity.org/cen_tech_battery_charger_fix.pdf
    • http://sozaxesugoj.mywebcommunity.org/13148805287.pdf
    • http://ronifibofizet.medianewsonline.com/jixojafevugofapuxixovefa.pdf
    • http://naliputa.mywebcommunity.org/cardiopatia_isquemica_crnica.pdf
    • http://fibiver.mygamesonline.org/infosys_technical_support_interview_questions_and_answers.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://f0ddeb88-3549-4a27-8821-6e3dd713f165.filesusr.com/ugd/2b74da_28b7fc98f100476eb008f07492b5f466.pdf?index=true
    • http://kakasis.onlinewebshop.net/long_range_two_way_radios_uk.pdf
    • http://wuwedilejom.myartsonline.com/personal_branding.pdf
    • http://dolinoko.atwebpages.com/acetic_acid_sds.pdf
    • https://068ba8bc-08b0-4b68-8151-f3c59c7a5775.filesusr.com/ugd/5a4aad_3e13627febab463599a554e904ece280.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c3dd2ea8-8559-4f6f-8125-b4641d2e7017/ubiquiti_m2_reset_button.pdf
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_761dcd3a47d84e8da4c21135c51897fb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2d4c4a83-c4bf-4cf9-82dd-2558641cecef/supelufodaku.pdf
    • https://uploads.strikinglycdn.com/files/4ed08060-7049-4207-91e0-c4ab7f14ce03/tokyo_ghoul_oc_mask_maker.pdf
    • https://uploads.strikinglycdn.com/files/15032043-f0a4-40db-8faf-ed9e3619b8ba/89889826309.pdf
    • https://dfa52777-3edb-460f-9b14-ca5101cd4ecc.filesusr.com/ugd/5360f8_ea4911286f164384b7809ca9fd4a294e.pdf?index=true
    • http://kususen.myartsonline.com/astronomical_terms_and_definitions.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001551a.bin
5a989733366ef6e3918a633db21ba261405a2b0d71d7c881d67275b6195af001		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1551A 5204 bytes
font_01_sfnt_off000166ad.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x166AD 1800 bytes
font_02_sfnt_off00016f3a.bin
d83c0651e37c81bdc2dbc0f3c41636ce226e82155a531e2517f6378231027109		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16F3A 11788 bytes
font_03_sfnt_off00019784.bin
975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19784 16312 bytes
font_04_sfnt_off0001ad0f.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD0F 4324 bytes

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