Malicious PDF — malware analysis report

Static analysis result for SHA-256 c36d5a24b51d29f9…

MALICIOUS

PDF

82.4 KB Created: 2021-03-08 19:23:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 26ee06cd61bcc9e1f326290bc19bc138 SHA-1: c3fd49df1b3934e540dd20392de5f533f26d0506 SHA-256: c36d5a24b51d29f9b4711753156d4614bfa6f7e22b9f678c4c8d479e24c9217d
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URI pointing to a suspicious domain, likely intended to host phishing content or a further payload. The document body, though heavily obfuscated, suggests a lure related to technical information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/123?utm_term=android+sqlite+alter+table+remove+column PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486748/normal_601bb90e0bfe9.pdfIn PDF document text
    • http://mujudesuxiropa.sportsontheweb.net/wikunakedug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460232/normal_6038c9ba8b675.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/how_much_does_a_cleaner_earn_in_south_africa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421780/normal_60391a26c6065.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483870/normal_6031b22771501.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/edipo_rey_personajes_principales.pdfIn PDF document text
    • https://cdn.sqhk.co/bepotedaxus/jhidggP/dojiliwelulevomimo.pdfIn PDF document text
    • https://cdn.sqhk.co/lewivapawo/hdjbgip/64463625860.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415530/normal_6043ff4710697.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/gopisezaposegazovezege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d581683-3c10-40fe-a0a6-6f00dbb746c9/kreepy_krauly_great_white_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/bin_sachivalay_model_paper_in_gujarati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f57c860-fa95-459a-a249-0ac720be167f/gunidebatokefosutexo.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/bluecoats_2017_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/79510533392.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/wurexa.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/bassoon_trio_free_sheet_music.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_off00010390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10390 5400 bytes
SHA-256: 433296e2381a37268c659aa6c4db8814ad06b987627adf61d73dabc4b6dbf04f
font_01_sfnt_off000115d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D9 11220 bytes
SHA-256: 90f50d19c7a6bb02fd13a2f7fcef4d465d43109cddd0ce5b3eb2efd743f897a5

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