Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3c0e9e3b5bad723…

MALICIOUS

PDF

68.2 KB Created: 2021-01-06 05:47:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6d59eea2bcb12b5ca8e86ab9b8fb6605 SHA-1: f4fda4256851a799d326fed4d604f9e435aa5564 SHA-256: c3c0e9e3b5bad723f4f6d8926e6306d4a6873e4db33b3118c334cf79fcf24819
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://traffnew.ru/aws?utm_term=bogoshipda+piano+pdf PDF link annotation
    • https://cdn.sqhk.co/loxowopiv/8Zij5Q5/1530205366.pdfIn PDF document text
    • https://roxomutina.weebly.com/uploads/1/3/4/6/134663133/lilakesodud_zazavamufom_sufabilelodawot_bulotafipenuta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500669/normal_5fd867637f745.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisedetu/jZhf5if/wuxuvoxukorakuvo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416299/normal_5fe838ee19e17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490375/normal_5fb27f2e9f232.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503214/normal_5fb75728b9eb4.pdfIn PDF document text
    • https://niguzagum.weebly.com/uploads/1/3/5/3/135390192/tutonod.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/6a38d942-d366-4b2c-b71a-3ddadb5f4dd1/win10_touch_simulator.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/copa_oro_tickets_final.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb7cfe81-d100-4e2d-9f81-6ed0d4d49630/interjections_schoolhouse_rock_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/super_mario_3d_world_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/movies_to_watch_offline_on_pc.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_off0000cb0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB0B 5224 bytes
SHA-256: c58c6c53bfbffcfa6f4cee390fb58c1f119b5a0ca85ebffd9770bb3ecad96295
font_01_sfnt_off0000dcde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDE 11700 bytes
SHA-256: 44f514e50020bc56267719f32058543e1130f8c42434f4ddd67f5dc77b11c8bc

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