Malicious PDF — malware analysis report

Static analysis result for SHA-256 334beec365999bc4…

MALICIOUS

PDF

66.3 KB Created: 2020-11-14 17:55:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1df5003fde77253704757968fe4ddd21 SHA-1: d9c611876ff936afa901fe206597a3c1b6ee14b3 SHA-256: 334beec365999bc484da7b154ff1ee80b1b40901d9bd9136dcfbf80f022655e8
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://traffking.ru/123?utm_term=what+are+the+factors+of+164 PDF link annotation
    • https://vebunigujop.weebly.com/uploads/1/3/4/3/134367951/6397460.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f873a9933431.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411250/normal_5fa9e792244ee.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/412712c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f8e2054d87a8.pdfIn PDF document text
    • https://zibefaxad.weebly.com/uploads/1/3/4/5/134594794/8769907.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390057/normal_5fa3ef013946a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371267/normal_5f94b53641d3a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vavale/handoff_report_sheet_for_icu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c338dfe2-3120-469b-94f8-805d253253d8/configuracion_electronica_de_los_ele.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/33763233156.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/fluvial_geomorphology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f71e8b92-09d8-40e8-8847-121a4042cf99/59081332311.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_off0000c863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC863 5244 bytes
SHA-256: 2ec8ec640124e473ad54da98ebd5b5e93ae392e4282d433367143476a0809a9c
font_01_sfnt_off0000da48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA48 10056 bytes
SHA-256: 5d9361c21f262b9bcde846d13eeae33bfffb81aaf777b2733d72100ca52fb640

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