Malicious PDF — malware analysis report

Static analysis result for SHA-256 8908824c4f0941a7…

MALICIOUS

PDF

70.4 KB Created: 2021-05-16 05:28:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edbe1291765c918de6e75db929c8983d SHA-1: 4d290cd2a568b0fd92b0f6eef57baee3b75b9dfc SHA-256: 8908824c4f0941a748cd1bb84204dbcb86a3d5739502dc53de82bf257e4e09e3
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The ML classifier also strongly indicated maliciousness, supporting the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/strik?utm_term=brinks+outdoor+led+security+light
    • https://cdn-cms.f-static.net/uploads/4366005/normal_60149ee5e92c5.pdf
    • http://load-bcp.com/pictures_of_gandhijiivvfm.pdf
    • https://lujinelux.weebly.com/uploads/1/3/4/3/134361227/xobabadifiv.pdf
    • http://hesap-al-sat.com/6_man_tent_with_fitted_groundsheetd8e1y.pdf
    • https://rujovisaz.weebly.com/uploads/1/3/4/3/134328318/14848bc33814603.pdf
    • https://zetovesejideze.weebly.com/uploads/1/3/1/4/131482946/felusufawolezebeled.pdf
    • https://dejurepezuneron.weebly.com/uploads/1/3/1/4/131452785/cbfa5b13.pdf
    • http://flowerport.market/kumuzepizebqxj8.pdf
    • https://kotafogora.weebly.com/uploads/1/3/4/3/134322717/tesemofelumaresako.pdf
    • https://kakowafalajoji.weebly.com/uploads/1/3/4/4/134455686/7163615.pdf
    • http://chempion.coffee/bugisitibijoj4be8.pdf
    • http://zesamoa.online/toyota_echo_repair_manualndhsb.pdf
    • https://cdn-cms.f-static.net/uploads/4445544/normal_6038b62cab3db.pdf
    • https://raputaluwim.weebly.com/uploads/1/3/1/6/131606275/felivenafat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/putelekireza/introduction_to_psychology_test_answers.pdf
    • https://uploads.strikinglycdn.com/files/a21ad23c-4e2d-409a-b76e-1dc868d550a2/medios_de_comunicacion_verbal_ejemplos.pdf
    • https://s3.amazonaws.com/nabifovu/jokesogos.pdf
    • https://uploads.strikinglycdn.com/files/5f636c54-5cd2-44f0-b9b0-eb311e16c0b3/how_to_thread_my_brother_lx3817_sewing_machine.pdf
    • https://uploads.strikinglycdn.com/files/295d5161-402e-4f6a-9e52-67d35690963e/medavawudinef.pdf
    • https://s3.amazonaws.com/matogapibelifiv/meade_8-inch_lx200-acf.pdf
    • https://uploads.strikinglycdn.com/files/268e193a-596e-41a5-9afb-345131f014c4/sims_3_update_for_mac_catalina.pdf
    • https://uploads.strikinglycdn.com/files/ec969bf6-f350-4829-9bb3-862d8fb7a188/bowefor.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_off0000d939.bin
952cee92f78c45b0d894899646e00929e4b0a89ab25dce11de9eadef644a82e6
pdf-font-stream PDF embedded font (sfnt) at offset 0xD939 5204 bytes
font_01_sfnt_off0000eaf7.bin
9f3b8e4b4e52720dd8a5af99d47bcd4641a170f7b25345c799b29bc14ad3a1f5
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF7 9720 bytes