Malicious PDF — malware analysis report

Static analysis result for SHA-256 df481a1889741f8a…

MALICIOUS

PDF

91.6 KB Created: 2020-11-10 18:30:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 21bd783c5d64d94f4d7991dc0d3b2c1a SHA-1: de3358aeae341cbb022e59c85a708a982606f166 SHA-256: df481a1889741f8a745defe81eddc0fea16990288bcef5b49a8ed73a6b20a579
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://traffking.ru/strik?keyword=borderlands+2+best+shield+for+krieg PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421468/normal_5f9a02fca1e34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426541/normal_5f9f6fd9d4838.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382972/normal_5fa6a6cfe6225.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5f88191e688a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408991/normal_5f949c2da8e84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5f8f4eaa1fa2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f9cdd58c5efb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5fa7607bc5fee.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/00db36a4-115f-422f-9fd4-4656065fd0df/god_eater_2_bullet_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fec9b7e-3d8b-4955-b1ea-d604b743bb71/integrated_math_3_textbook_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8ee4692-bc12-4436-b566-fcba38fadb83/need_for_speed_most_wanted_apk_obb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3352e9bb-a169-4fa1-aa40-5fe9b7ab1aca/ba_k_con_nghe_hp_m.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/180686e3-ac80-4e70-8c8b-9d5368aa9780/rojurezomakevepezaxite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f2dcc94-ef1c-42c5-812b-4ff33c1a46d4/autocad_2020_crack_x-force.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da792a47-4101-4d44-8f13-7f9fe23bba63/kubota_workshop_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fbd55a0-fced-47a5-9d1c-e5ab703e296d/what_does_fse_mean_in_spanish.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_off000124e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E3 5552 bytes
SHA-256: cbe432fec5ab07638fc1d50cd57a57cc76556618a1a413c781310a81f773fc77
font_01_sfnt_off000137c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137C6 11796 bytes
SHA-256: 40311f13ca4578df778b844bdf425f60ff26fbb6ebdbb647aefaa75144a75fb7

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