Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8559f6d0c93cdea…

MALICIOUS

PDF

76.1 KB Created: 2021-06-08 21:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 707e201f0ea079a47d49be3c43f34fb2 SHA-1: b8c1e219469f012ac69b1837d04fb7f735d8897b SHA-256: e8559f6d0c93cdead2ce965421f395bff4bd46b986ab761e4fe065131afb2467
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crysiq.ru/pbw?utm_term=tamil+hd+mobile PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4461250/normal_5fffcea01c12b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465949/normal_603a58afc870f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466676/normal_600537ca6d98a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370063/normal_5fd9aeab69028.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454673/normal_602e1b7cb63ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387037/normal_601dc9d8ebd14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476593/normal_600d04aa87d80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494166/normal_5fdb6fe5d87c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380545/normal_606b99ef98f9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387933/normal_5ff5427ea31eb.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/de462da1-7289-44e2-ba05-9f6c94052a22/download_design_home_mod_apk_android_1.pdfIn PDF document text
    • http://vinivat.pbworks.com/f/20261423531.pdfIn PDF document text
    • http://ditatafomofu.pbworks.com/w/file/fetch/144845205/portals_of_phereon_traits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22e3f1bb-fa24-4aad-bb8f-853f504171d6/can_chocolate_keep_you_warm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bda7622-ee99-4e86-a103-7a2d62eada0f/16921333432.pdfIn PDF document text
    • http://tusoxefum.pbworks.com/w/file/fetch/144478605/juki_sewing_machine_parts_manual.pdfIn PDF document text
    • http://xuladejuzor.pbworks.com/w/file/fetch/144553665/texujixuruzafepetoxofagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/981ae9d6-9f79-404a-a5f7-80be64caa546/26053495756.pdfIn PDF document text
    • http://wiwedano.pbworks.com/w/file/fetch/144425322/55441130828.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/419cc8e6-83ee-4b4e-b257-78c81dd7745c/understanding_financial_statements.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_off0000e2fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FA 4484 bytes
SHA-256: 7510eaa8afcd2954cafe307f11dbaa2a8ee108c889597c242c1da2dd934b90ff
font_01_sfnt_off0000f223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF223 10416 bytes
SHA-256: f367f76a181ec27fe8a9ad430ec1b94506e27dfdf216f262f7dfffa0b20e642c
font_02_sfnt_off0001159f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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