Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5e89b80dba7fe2b…

MALICIOUS

PDF

65.9 KB Created: 2021-03-14 21:16:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2eb4b8b258a8d047811c723d8051ed40 SHA-1: 9995a02f18487613698d54f5b3b7ff822b6c336a SHA-256: c5e89b80dba7fe2b42631aaddd2462e7fdd858601081d389705c55c1892957e7
134 Risk Score

Malware Insights

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

The sample was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier returned a high probability of maliciousness. The PDF contains numerous embedded URLs, suggesting a link farm or phishing attempt. The presence of a visual download button lure further supports a malicious intent to trick the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/wix?keyword=guide+to+analysis+of+language+transcripts+3rd+pdf PDF link annotation
    • https://cdn.sqhk.co/zapuduve/gib8tRr/boss_tu-_2_tuner_pedal.pdfIn PDF document text
    • https://cdn.sqhk.co/butiluluvuk/ajcgcjj/91081142526.pdfIn PDF document text
    • http://fimosabu.iblogger.org/38575074129.pdfIn PDF document text
    • https://cdn.sqhk.co/salobosemiv/PLZOhe5/41661069538.pdfIn PDF document text
    • http://wedavinonuvovu.22web.org/wuvenezenudoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jaxunukologefis.onlinewebshop.net/whats_the_difference_between_sequence_and_chronological_order.pdfIn PDF document text
    • http://fotopokidag.epizy.com/18394840110.pdfIn PDF document text
    • http://kimawawasero.onlinewebshop.net/xefumutewokupivugej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2047d83-e8c1-4dc7-abee-7fc8e4e1fc31/lekodurizotegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cab5cc5f-83b1-4704-955d-3872735a6333/554460762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f6450c0-8d62-4348-adca-0eaa989a97d8/52669347217.pdfIn PDF document text
    • http://xojuzovanafugem.rf.gd/67835001179.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82fd95ef-d1f9-48ca-a254-52ba6ebeff24/wukev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a74169bb-0c45-4387-b365-472d92667c15/how_to_sharpen_your_business_writing_skills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57acb226-a465-4791-8411-e44bc71271e0/who_invented_the_potato_chip.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/math_multiplication_worksheets_grade_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3caa2b45-8169-4cb3-996a-98c5c4840a0e/nyx_cant_stop_wont_stop_concealer_color_match.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/andante_con_moto_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d034ec5-7494-4fa9-8207-d4f04e846441/law_of_evidence_bare_act_in_hindi.pdfIn PDF document text
    • http://giritinip.epizy.com/alto_sax_altissimo_finger_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/31777379599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf6b5706-41d5-4f15-94a3-232e6b085a95/13866009494.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC408 5620 bytes
SHA-256: fdb13043b73a182c853e969901f11b0e25e2fe35464c4fbf1ee861c5a57825ad
font_01_sfnt_off0000d748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD748 10104 bytes
SHA-256: 5fc11de71a01d82a589d2cf1ad6d7213da00f0b064c427e12943eb8fa5ccfc3b

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