Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0a8806bb1480e9a…

MALICIOUS

PDF

70.7 KB Created: 2021-03-16 11:12:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c130ea756d8c746065308ebfc541dca SHA-1: 142365ef8f01756942aa723ea7f26786bfbdcb0a SHA-256: b0a8806bb1480e9a617ab38c86aadf79b38bedb65b6a55e51343bbac64ba7f2a
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 high likelihood of malicious intent. An external URI pointing to 'https://midufefew.ru/wix?keyword=ace+personal+trainer+study+guide+pdf' was found embedded within the document, suggesting it is used to deliver a secondary payload or redirect the user to a malicious site. The document body, though heavily obfuscated, contains metadata related to its creation, which does not detract from the malicious indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/wix?keyword=ace+personal+trainer+study+guide+pdf
    • https://dajusokododolin.weebly.com/uploads/1/3/5/9/135964726/b2f0d9c5.pdf
    • https://fetevemukimagon.weebly.com/uploads/1/3/4/8/134896640/7431459.pdf
    • http://vitodibiwanezej.mypressonline.com/51436368783.pdf
    • https://godowipi.weebly.com/uploads/1/3/4/5/134520373/wadilifaguvalij_sifovobewubefo.pdf
    • https://rofonoxerip.weebly.com/uploads/1/3/4/3/134312531/5615542.pdf
    • https://sumikoxivabozo.weebly.com/uploads/1/3/3/9/133997645/bosasoruwoxid_buderuvoduve_dimomuji_woduwobeg.pdf
    • https://gavizixuf.weebly.com/uploads/1/3/5/3/135334805/domuleg-nasudurisewekut.pdf
    • https://tivufotevomok.weebly.com/uploads/1/3/2/6/132682035/vositejuni.pdf
    • https://zedodunojoponex.weebly.com/uploads/1/3/6/0/136083391/gubipuwis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zupitatip.atwebpages.com/59750548557.pdf
    • https://uploads.strikinglycdn.com/files/202b5679-82ed-4ec7-914e-f397c26005a1/43755690544.pdf
    • http://wasamatebupo.rf.gd/catering_logo_design_vector_free.pdf
    • http://bujijawuta.atwebpages.com/tixijopefa.pdf
    • https://s3.amazonaws.com/kelageketisefuv/whatsapp_mod_hide_online_status.pdf
    • https://s3.amazonaws.com/gedimuta/mofepajofugadonubizuva.pdf
    • http://gonidiwofove.epizy.com/bandos_guide_duo.pdf
    • http://tososite.onlinewebshop.net/bodyweight_exercises_for_arm_strength.pdf
    • https://s3.amazonaws.com/lazolu/97605872174.pdf
    • https://s3.amazonaws.com/tokudapele/google_site_template_design_free.pdf
    • https://uploads.strikinglycdn.com/files/63975963-f8a1-45cf-a55a-92a19d2fb6fc/63097760043.pdf
    • https://s3.amazonaws.com/sefipa/fisiopatologia_asma_bronquial.pdf
    • http://tanozetodane.rf.gd/raxupide.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_off0000d56d.bin
5ef997a279caea5c07c4b604b293d61aed8c3bad1ca9ff5068c16f281e0071b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD56D 5416 bytes
font_01_sfnt_off0000e7f4.bin
e7305d58c3e3990a78eac21d339bec345fcc2691c2a92fa3146b08ce85a6ea78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F4 11004 bytes

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