Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b34d03661fb9e5e…

MALICIOUS

PDF

70.7 KB Created: 2020-12-19 01:20:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1de821bca4659ccfb1cdb8d354e2f805 SHA-1: 1a8769f0aaa0bd57d9cf0afa521e1b9040338e85 SHA-256: 8b34d03661fb9e5e5830edb35220f22fe699e6a1391ea901a49feb5889a1b799
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically 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 document body, though heavily obfuscated, appears to be a lure related to product advertising.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/aws?utm_term=peel+and+stick+laminate+sheets+for+cabinets PDF link annotation
    • 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/b33d85df-9692-4b32-8c4f-ec3143fe9a04/nq_mobile_security_7.2_premium_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c6804b2-e072-4c6a-9eb0-8e337e65fb34/change_chromebook_password.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/btv_solo_crack_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d95385d8-2887-4088-9574-1381584f8d62/67902377549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e04661a-427a-458a-8349-3bd8f43e28d5/bebizetatu.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/consultar_imei_para_saber_si_esta_reportado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b233e92-6089-472b-a0f3-68d6e2fbf64f/ns_toor_balance_sheet_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/pukubexe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc76422d-e573-486e-93f8-890f1e3a83ea/2218988004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13e28f76-f49c-4d5e-b17a-d844a49c841b/73757868588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43cba0bb-0ed3-4116-bc32-53ae79196628/what_is_metafiction_in_writing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f88f656-95b3-42a6-9b82-cc95a444b13d/racing_rivals_hack.pdfIn PDF document text
    • https://todayshomeowner.com/wp-coIn 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_off0000c9f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F5 5252 bytes
SHA-256: 0c2e7f85defe6b235555c1b387fcf32f390ecf46ec9b34e8d2a82186a3ac8336
font_01_sfnt_off0000db98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB98 10544 bytes
SHA-256: 00f7db0c494a89d79c3e0e108c751640b30da485a635d939813e9a72d1051de3
font_02_sfnt_off0000ffb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB7 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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