Malicious PDF — malware analysis report

Static analysis result for SHA-256 1799084e357d237e…

MALICIOUS

PDF

88.9 KB Created: 2021-05-29 17:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9eda928ac798eb6c04fe253f464006b1 SHA-1: ede085c89408056d285f47999bf3c82c79df3ebf SHA-256: 1799084e357d237e74e7d84154bc4bf5e72120dd0ea4daacb3c5d6ff4ebd45af
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with one prominent link pointing to 'vilenefex.ru'. This URL, combined with the heuristic firing 'PDF_SEO_LINK_FARM' indicating a large number of external links, suggests a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vilenefex.ru/strik?utm_term=fitfort+smart+hrm+bracelet+user+guide PDF link annotation
    • https://sonujeti.weebly.com/uploads/1/3/0/9/130969686/0ecb4a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529087/normal_603041bb572fb.pdfIn PDF document text
    • https://tozobaveje.weebly.com/uploads/1/3/7/5/137501006/vapadufuzosu.pdfIn PDF document text
    • https://jasezanita.weebly.com/uploads/1/3/1/6/131637239/rokused-togewe-nuvuvo-bunoserux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490534/normal_6030eb18c2b4f.pdfIn PDF document text
    • https://vaxamapex.weebly.com/uploads/1/3/4/0/134017084/7085507.pdfIn PDF document text
    • https://golamusexa.weebly.com/uploads/1/3/1/6/131606818/1375563.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/73d8d546-ddf1-43d9-b968-9fb8e89cefd6/ar_15_schematic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2807e942-f1fe-436e-b56f-8585a48ba3a8/vetigakegelojipinak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36f45b0d-2b3d-43fe-b75f-85f0128c2aca/89857185265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17311875-1795-4425-b148-12fd14be850a/lozaxakesotolofejo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0544a014-37b7-418f-beeb-c7ad265cc65a/lasko_16_oscillating_pedestal_fan_stopped_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b1971b6-3c69-47fc-8ae9-90be5d06a8e8/hp_desktop_beep_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b7d8421-ffe8-4820-a7fa-da6be8903d28/tableau_training_classes_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/403e60bb-c2dc-4b84-9716-cfb2f7791e08/figerajopaxaminutawif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f70af806-26d0-4d60-908d-d546bc16d843/historia_de_la_tabla_periodica_de_los_elementos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d12dd5f7-f6f6-4290-9242-3aab52f20a72/parugibetunopesuxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a55a6903-93d9-4d7e-a1ce-a9e45cc3f5e8/29496319777.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11f230c2-d4ba-4d94-9e75-2f21e9aed18d/lasivobawefot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74c9fc9f-1fdd-4121-b8a2-8409d4f11501/qayamat_se_qayamat_tak_mp3_song_downloadming.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_off00011e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9E 5528 bytes
SHA-256: 9bc907bd8ecf1eaf45834806d87ffa58136fb71cf4060a05cc2efd7ac6f0ccdf
font_01_sfnt_off00013144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13144 10812 bytes
SHA-256: e74acfe668df33de19c7e05f6b8572ccda544a90545e214183e2239e3d9955bb

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