Malicious PDF — malware analysis report

Static analysis result for SHA-256 e68c6921c783fc62…

MALICIOUS

PDF

77.3 KB Created: 2020-11-18 17:47:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 9c2d691dd724758cf05cf4abd0550fcb SHA-1: dcc876e0c7c4c1a8eaec2611387fbda201b42efd SHA-256: e68c6921c783fc621fb33ca5135e99be824bea8e49bb903bbb4210508dadd093
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a ClickFix paste-and-run lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://traffine.ru/strik?utm_term=realtek+alc888+driver+windows+7 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408995/normal_5f99b419ece76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5faac81721842.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e493c5b-b351-4120-8e64-bf2046a29c2e/the_ascension_mysteries.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af6fc042-ca5d-4f4d-a8d2-4e86be8ac64a/busemovijugafor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a468d2a-f618-45b7-9613-61cb0c99da63/wivelujivowitogosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a78f7a78-dbe4-46b7-9928-2ea5227de860/wewatolivuxasenokaponipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d8407e6-131a-4c02-ba10-a1f7e176f1af/99429722184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd7e9a98-d9bc-4300-88d1-8f69d1106a7c/49981912210.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9960a916-31b2-48b8-82b1-00622cff912d/juzabozasewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43394eb5-fbe9-4ab1-941f-fbc3aa10c5b3/45877425320.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d03d945f-947c-4506-b041-63447a973dc2/20733379087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0084e95-3204-4836-88e6-024de2a92e70/army_executive_officer_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbfc433f-b38d-490f-96b9-4c449e59d6aa/kokemibubofuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7a3d98f-813d-4156-bf48-f82ed074905a/budget_dello_stato_italiano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6466e82-a6ef-4d24-adef-2f2417a6250f/pekesekutekobeso.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD775 5428 bytes
SHA-256: 2663ed881df0e1ed0080aba695d10d22f65abcc1ba2740057778b90014b0a386
font_01_sfnt_off0000ea17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA17 10384 bytes
SHA-256: 58a57cfd8ee25751d5e605a8c0cbf27de9c7a90c22dbc5a3cbdb7d273956bc38
font_02_sfnt_off00010ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDC 17460 bytes
SHA-256: 04d6bd4dd1b3faf60f445885d32e6116ff6d8b2d5451f237840ea7db5f55b4bf

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