Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e6cf720c29e5df4…

MALICIOUS

PDF

77.1 KB Created: 2021-05-30 07:58:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 758ecfd74c85821dd62c4d7abcb0501b SHA-1: b4f37afff8a8bee12df0cfdedc86aac2e6f786e7 SHA-256: 8e6cf720c29e5df46684ffe94b070b42fa14d588b56fc479932ffcd8693fc13d
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://resalured.ru/123?utm_term=information+report+of+demat+account+project PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420604/normal_5fe53d57c493e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475738/normal_605a111f7bf86.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4471096/normal_60afef1f80e1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501206/normal_60628dce0724f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466413/normal_601a38a4a3d60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470967/normal_605cb2d378f22.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479923/normal_5fec004fcfee6.pdfIn PDF document text
    • https://putifetoz.weebly.com/uploads/1/3/7/5/137515519/4066e98cb1dc20c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_601709274617e.pdfIn PDF document text
    • https://nutolifawivu.weebly.com/uploads/1/3/1/4/131437776/xubekelimemokogekaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471960/normal_60290d71702d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454813/normal_603bdb61b6494.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/09a2bd22-e3fb-47de-81cb-466160c8b398/2014_subaru_forester_owners_forum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/161eb9dc-15f4-4c78-926a-34fd6d817b7d/global_postal_service_tracking_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e87bf450-40c5-4c17-b2f7-eb7fb0021eab/how_to_fix_a_delta_monitor_bathtub_faucet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10c6bbeb-e3d1-4b58-83ce-a4737dc7edcf/gajiwikuzesedidoza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1a9b79d-af1e-4249-8f0e-0083545eace3/veziwarewozefunulerevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ac7913a-02de-44cf-b86a-e606d8799856/tejofiwewiladakalojufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40c48143-f7f0-4d53-9f86-cbeea327d0fd/how_to_fix_lasko_tower_fan.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_off0000ee36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE36 5104 bytes
SHA-256: 2114a73a3988abf192650eb0bb7e3ac4f2b32c63dd820c2e45e64897648ffda5
font_01_sfnt_off0000ff83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF83 11628 bytes
SHA-256: b10c3ddc26b80f9ecc9be8742e10a032b5212809d095b414d923f7ee8f4b43ef

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