Malicious PDF — malware analysis report

Static analysis result for SHA-256 0239f6eac91df89a…

MALICIOUS

PDF

99.3 KB Created: 2021-06-01 21:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c9b07031295c620d157f0c6c3eb777b8 SHA-1: fcb208099d81535cdea5e78cb82b428cd343190b SHA-256: 0239f6eac91df89af26bb617456ec8ac3043c2e8bce7408fad04ff34816b94b8
156 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 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 0.9998

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://archism.ru/pbw?utm_term=vikings+season+5+episode+summary PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4366642/normal_60b3cc1fc1bde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468268/normal_6042d7b32d522.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471236/normal_6051eca44e5c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370080/normal_6022297081298.pdfIn PDF document text
    • https://xoxoxiwozolem.weebly.com/uploads/1/3/0/7/130739626/xeximaru_wuveta_nulis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480148/normal_5fde35b813130.pdfIn PDF document text
    • https://zoxofaduw.weebly.com/uploads/1/3/2/6/132683138/3ddf822a99e99a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459792/normal_6064b58a38bf6.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/9aece692-4b31-42b5-9c4d-f0a7f206669f/what_is_dog_man_and_cat_kid_about.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caf9306c-147f-4389-b107-14f7ed7fafd4/82041427266.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbda2ee2-ca34-4d5e-a6cd-3b04a80f7382/what_is_the_meaning_of_cleavage_in_biology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81bb0b57-9b8d-4de8-aff2-cb8b3a6032cd/jodoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d81b12ea-8956-4c3b-96d0-e92bb17078c0/nunovalivitele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cb3ef29-ee3f-47a7-9bed-9788b88c79d4/60444912765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80db7026-26bb-4eab-9061-6eeb8988e0d5/wwe_2k18_apk_obb_highly_compressed_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22785ab8-fa5d-4267-a6d8-42d3280b6ae6/pefobanutebagazesotebol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/837bbbc3-1678-407e-bd02-d365afbf68d1/singer_sewing_machine_info_uk_phone_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d06f206-ca0e-4537-8fab-44cb4c3c61ee/vixonewitapegomusimaz.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_off00014239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14239 5504 bytes
SHA-256: f460b662a49ddbecb5349104773d094a816fe1d880be48b52b2ccfacc97f5983
font_01_sfnt_off000154f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154F1 13792 bytes
SHA-256: 0bced920573808cde337556c771759d017650f64fdb99efe5186479d12e5e253

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