Malicious PDF — malware analysis report

Static analysis result for SHA-256 1708ef28bc0671e2…

MALICIOUS

PDF

76.4 KB Created: 2021-03-24 17:56:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 30e0a36dd96a7de2c2b7a135469a2808 SHA-1: 552ddda150d68c46f7d356da6909caa7e60f0da7 SHA-256: 1708ef28bc0671e2921cdcc99f0b4b54223bff206bfe0b0d67c1e16b34a98514
104 Risk Score

Malware Insights

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

The PDF file contains a malicious ML classification score and a ClamAV detection for a phishing trojan. It also includes an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading malware. The presence of a 'download button' heuristic further supports the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/award?keyword=longman+dictionary+of+common+errors+new+edition+pdf PDF link annotation
    • https://cdn.sqhk.co/bipaneri/ec2eLA8/nikah_mubarak_stickers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_6016f07104f7e.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvurero/jcV9hd8/roller_guide_meaning_in_tamil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411500/normal_5fea2e153892e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_60536dd4c911f.pdfIn PDF document text
    • http://fozivot.mypressonline.com/zamuvixupojesaxufes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414871/normal_6016fb521855a.pdfIn PDF document text
    • https://cdn.sqhk.co/sepovili/5dmWCrS/7136212410.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471996/normal_602264d037047.pdfIn PDF document text
    • http://jadaribod.mygamesonline.org/solving_one_step_linear_equations_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496148/normal_60451131aa8cc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/1f272bf5-d31b-4fba-bad0-28b1356189ef/lewadipatelugofonaxaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08f31523-8ba3-433e-b2e3-c5ee41ef2bb7/9282765641.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dd48efe-c983-4145-9718-909ec7df50e2/sonetipi.pdfIn PDF document text
    • http://molagegivijoxu.onlinewebshop.net/famelexoxubuvobovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ed86c76-3e23-4669-b997-a0571114fb12/tunekubovusegelivekukej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2b64481-a7c8-4d3d-bdfd-cd857a96d220/wisodoxikewok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3abb98d-cb96-4a1d-a8d0-3488668e3dda/lakshmi_sahasranama_stotram_in_telugu_free_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD547 5364 bytes
SHA-256: 8d518e9e0ce0c405e726a081ae82d2532b35eb8876d1ea532f7a987a8e2f388c
font_01_sfnt_off0000e788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE788 17188 bytes
SHA-256: f97b7e586875a91ea7ccb14b2765aa0e43e39e66ad56693a8c362a0acd3ee762
font_02_sfnt_off000113e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E4 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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