Malicious PDF — malware analysis report

Static analysis result for SHA-256 daecef9834b6daa3…

MALICIOUS

PDF

70.3 KB Created: 2020-11-14 10:00:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 3165045efc19a79068b88db79c5b0360 SHA-1: d33191c70ffe7b67fd2691041cb8ff7615321a34 SHA-256: daecef9834b6daa3e83379b1e166c23435d84d981f5d38eff86097057310f6eb
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 0.9997

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://trafficel.ru/123?utm_term=duck+game+4+unblocked PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391636/normal_5f99a13a01d10.pdfIn PDF document text
    • https://gijakumode.weebly.com/uploads/1/3/4/3/134306186/de42b88e27a9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376096/normal_5f8e958fb4ba5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370777/normal_5f9194a721f4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5f91e43ba4d36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386094/normal_5f934765cc0db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393761/normal_5f95482424cda.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/45e542a8-9f95-4afd-a9be-9aabb2601fec/pvz_heroes_cheats.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/io2-_ion_lewis_structure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21e756d8-524b-44fe-bb17-9e948f9caf82/68797833520.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/nibalumixezu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d49d12a-ad10-4120-8925-1474060edf12/zaroligeke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f81bd6ab-f03c-4757-955c-3369025ced63/5728191516.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_off0000d62b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62B 5276 bytes
SHA-256: 9fe9e8b511d37835ae2b2b4909f27e2a511aae26aba61751b575b0ec5f9bff17
font_01_sfnt_off0000e824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE824 10716 bytes
SHA-256: e476d6d89f2c6a58721a72cf172352c0c933c2fa21ecc0dff36167c4606bcd07

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