Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eab3ac689a8d3eb…

MALICIOUS

PDF

79.6 KB Created: 2021-05-28 03:32:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2935859cf893ad1bf4e44a32b347a810 SHA-1: df8e7ddc5912fee7120b4146cf02f967ff035ba2 SHA-256: 6eab3ac689a8d3ebf2aac6bffb20fbf23d36d49aa78fa6b2a01e0b1d7d6e76a5
204 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. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://midufefew.ru/strik?utm_term=come+trasformare+documento+pdf+in+word+gratis PDF link annotation
    • https://kowedanu.weebly.com/uploads/1/3/4/6/134687265/rikijumuberefef-zovefofaki.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/4248372.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448713/normal_6021b98b42c7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406466/normal_6021759d9f018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478438/normal_605a07f9b7e9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404739/normal_5fdb6703ac5a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501645/normal_60303b6b903a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419836/normal_6039f91d37139.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370280/normal_5ff68f68a5aa3.pdfIn PDF document text
    • https://dizusama.weebly.com/uploads/1/3/4/7/134730201/1974720.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408348/normal_60336331b6fc5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481552/normal_5ff58a71ee9e7.pdfIn PDF document text
    • https://telavepifamika.weebly.com/uploads/1/3/4/3/134352802/kavurixur_pewonetukodum_xiboxedozev_jonunitoder.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408711/normal_5fd6657bdd76b.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/8a5ae28f-6308-43a0-a64a-861bdef8085e/the_world_is_too_much_without_us_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e101bc5a-d4a1-47ef-9298-14b2f35efc50/dalewepibalisonigiromopuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67a712e1-734e-4efc-b4e9-9f93c2721a6d/31554514452.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_off0000f715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF715 5440 bytes
SHA-256: 102879405632bef3b68cb622dc495e4cb138fe9a6acb6fb16c68583163dece0a
font_01_sfnt_off0001098d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098D 12904 bytes
SHA-256: 6ded8c95a4ab9f56ef4a6d5e89ae11524f325725fbbba3d8ce297fa5824e9fa7

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