Malicious PDF — malware analysis report

Static analysis result for SHA-256 161bee05c09206a3…

MALICIOUS

PDF

68.4 KB Created: 2020-11-14 17:16:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5d676d6fc83a99a8101f51be52c52454 SHA-1: 973699511c2b350d481d93d47e44d8dce45d2c45 SHA-256: 161bee05c09206a317c545c79f05632347ce4d6d20189a9c3c8c74df692c2ad7
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/strik?utm_term=navy+sailor%2527s+creed+quiz In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413238/normal_5f97d11167f71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f879a45e52fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369645/normal_5f9933c99d17e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f87ebcd25c6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466165/normal_5fa868bcbdcd3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2d9a24f1-3175-4283-93e6-051314b01134/tu_meri_mohabbat_hai_mp3_song_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bed68fbf-266d-45a6-a36a-9a287a111d61/jofomutikego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2c28da8-5861-4ed1-ac50-cd5d2d3126d7/kugadaratifikedugodirovew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbf58553-42c0-4339-bbb2-f27ba6d955e4/pearson_algebra_2_workbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c369be0-fae6-412d-b1e3-5a9d43044d33/54804984015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3b5381e-37a0-4387-b764-ac1c2fdf2eda/pdf_digitalni_marketing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb26708e-32b8-4845-a727-1641865954a7/bofuguzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4c0a5d8-d4a8-44cf-9832-04b9da7acf55/58146236318.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5f9f152-e250-4d82-bae9-b6cf0ba73014/hydroforming_of_sheet_metal.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC324 4972 bytes
SHA-256: aa705bb5b1d846c542032c3c656fa9f67a024c20d4b2a26da38a1753d61d0176
font_01_sfnt_off0000d42f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD42F 10288 bytes
SHA-256: d7cd42692aa383202089f8eaab3809c25d39b8e796c88970ca028b4dfd34a9ae
font_02_sfnt_off0000f736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF736 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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