Malicious PDF — malware analysis report

Static analysis result for SHA-256 866f1f544045abfc…

MALICIOUS

PDF

70.1 KB Created: 2020-11-17 18:32:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 594eb21ad0062567de7e85607c15cf0c SHA-1: d512b56e771555e516248c841a024f545b3195a8 SHA-256: 866f1f544045abfcef50488353b3f16c563590f73ba73f9fabc85c4a39048bef
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffe.ru/strik?utm_term=watermark+remover+from+pdf+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412887/normal_5f99bbb008cad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367947/normal_5f8762ba48a0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368223/normal_5f88692e31396.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403429/normal_5f925f3b613ba.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/a4e8bfa7-98a3-41c5-8c7b-6194b801d346/66752935344.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/coreldraw_x6_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67669767-696f-4ca4-b527-cfa117f5517a/nilagewutorubumorazeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76211030-adb7-4f06-ac88-5399e6367911/bekipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6724ef6-4bb5-48dc-b936-6743615d59af/7880419054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/360c90f9-870f-4b3d-9c88-50652fd083f8/dusk_till_dawn_mp3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c61384d-732b-4b67-9fd8-857497d17639/three_levels_of_a_product_by_using_the_hamarvik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4e3a018-f91f-451d-963a-0dca8dab73e3/tuxavitedixojigesukevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/980d9ac8-1244-494f-aab3-0ff83cf5b420/bibegoneni.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/76181232641.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93eb48db-66e0-4434-bfbe-80f858388c22/my_hero_academia_episode_51_dub.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_off0000bee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEE0 5116 bytes
SHA-256: dcb84f3a9a3170f562419b870e49a75e33dd95a3fd7f793cc95f82b799905389
font_01_sfnt_off0000d048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD048 11052 bytes
SHA-256: 00893c0479917c3d55fc78b23ce4663069b80986e4f790a9ad7b65d941ffc1f4
font_02_sfnt_off0000f63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63C 16060 bytes
SHA-256: 1018660efa6a1a00280f0dbd6ee9814149b2344b9acf14d98de2cb76d1e712aa

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