Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3c9dfd4937604b4…

MALICIOUS

PDF

71.9 KB Created: 2021-04-06 00:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b9c9ea21953b51dead8a3af0141a7ebc SHA-1: 2229fcd454399a0e90072ad62a747a2b343d4705 SHA-256: e3c9dfd4937604b4a9eebf000c961b6d6ec1443cf209f72a0aae066a84f61756
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The ClamAV detection further confirms its malicious nature, flagging it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'social media marketing for beginners pdf', likely intended to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/strik?utm_term=social+media+marketing+for+beginners+pdf PDF link annotation
    • http://itanto.space/datinigufosigitepidedejtpzyz.pdfIn PDF document text
    • http://jefevivavifax.scienceontheweb.net/67362108964.pdfIn PDF document text
    • http://fujigukatujewu.medianewsonline.com/rainsoft_water_filter_parts.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/dodekasefama.pdfIn PDF document text
    • http://ehaberdevlet.com/feruximikozanonenawipeluwslfa.pdfIn PDF document text
    • http://rowexusaje.mypressonline.com/electronically_sign_free.pdfIn PDF document text
    • http://vakiduweg.mygamesonline.org/47672129985.pdfIn PDF document text
    • http://stickerrus.ru/toro_string_trimmer_attachmentso5ilu.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/84045861733.pdfIn PDF document text
    • http://sogejovep.mypressonline.com/canoeing_merit_badge_workbook.pdfIn PDF document text
    • http://sewawena.scienceontheweb.net/characteristics_of_romanticism_in_english_literature.pdfIn PDF document text
    • http://niburufajanuto.sportsontheweb.net/physiotherapy_anatomy_book.pdfIn PDF document text
    • http://topmassage.net/zageziwekodofakul97kta.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/dusubonifu/2968920207.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/salegakapuwasujukafin.pdfIn PDF document text
    • http://fadudenomo.onlinewebshop.net/fupimibeduvuragufa.pdfIn PDF document text
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_7336941596e7487f9e600c0b1d3c6493.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jawusawar/10973422410.pdfIn PDF document text
    • https://2a403a33-5f6e-4534-96f9-742aa7325afc.filesusr.com/ugd/d2da83_5f10141ab6ec4bad9b7c9dde12f15b9e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/jojo_moyes_after_you.pdfIn PDF document text
    • https://c809e8a6-5bdf-489d-8d8c-df4e4638a115.filesusr.com/ugd/45a296_d7b30ca7f2cb4298a6596d110f855750.pdf?index=trueIn PDF document text
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_df171314993b4b71bfdcf4ca8a16394b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/zaweveramuvujulakeragales.pdfIn PDF document text
    • https://4192d618-ecd7-4808-8485-efd4d6773ded.filesusr.com/ugd/17a5db_09836f803d25426b8d4617b320688592.pdf?index=trueIn 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_off0000dcbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBD 5784 bytes
SHA-256: 251297a2656f9c0abba9a75681e7f265a3c6ea9c2ec811fa639a478acf1f1d58
font_01_sfnt_off0000f057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF057 9876 bytes
SHA-256: e5da9c35bd95f57c9df16910c808e173466cc54c07c545546ae3aacbe31f6c19

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