Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa82d2b1d0f8a913…

MALICIOUS

PDF

69.0 KB Created: 2020-12-31 17:48:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8e5b46598274188ff10970b507ee8e17 SHA-1: 951e5994f461f9e7b4986a2d6758f87a87c0408a SHA-256: fa82d2b1d0f8a9133687cf52bcaf62b092f5ab082e780a5e6c4a99518152746c
96 Risk Score

Malware Insights

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

The PDF file contains a link that masquerades as a game update download, which is a common social engineering tactic. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URL points to a suspicious domain, likely serving as a download source for a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=toy+blast+update+download PDF link annotation
    • https://cdn.sqhk.co/zoboxoba/gKie45J/mortal_kombat_x_how_to_unlock_kitana_costumes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_5f91a6d29958e.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/8a41bc2b-c7d7-40be-a118-44f92d1e8f9e/what_is_spring_constant_in_hookes_law.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/567c960a-157b-4a99-af00-ebcdd6f9431d/pipawonanebozowuvexisadal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7225a759-0740-4875-8635-e9ca9a9cda17/behringer_q502usb_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e33c069-3b09-4678-b108-68ec5d86cc99/88126342180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c192214a-d581-4035-8388-063a913c5277/lyft_driver_signup_process.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/439b5f87-6932-443a-905a-db595fb205c5/rijab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f5390eb-b3b5-4e0d-975d-2cc4e3f5e271/genealogy_books_for_sale_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/185c7a39-ffbf-4d7e-9bee-6f70978c1200/halogen_work_light_led_replacement_bulb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d7b7965-8a9b-4627-8eb0-b6a14c3f7435/44108692123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86cf9106-da4c-487f-92a9-501de5a2e5ae/1620351562.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_off0000cc4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4B 5140 bytes
SHA-256: 9e152c067bd91741bc6b9127d8585f2491d16fc64198f16feee94d87096289ac
font_01_sfnt_off0000ddea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEA 13528 bytes
SHA-256: 1cf4ff9e8d9c85c33d668c25050c5004d9189b78cb001f34c9e09b8787a791c3