Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae0de0332fbba314…

MALICIOUS

PDF

80.0 KB Created: 2020-11-30 16:00:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 39d5367263872731ad6da39241687781 SHA-1: 93ad5a405f3a873aef3485c5aca4267ebaae4a59 SHA-256: ae0de0332fbba314442f00d5c12e31aabfc6e63f3da808ab2d005c59d0ab5353
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-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.
  • 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/strik?utm_term=pasay+city+zip+code PDF link annotation
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/tevetilodoseli.pdfIn PDF document text
    • https://welerenumabo.weebly.com/uploads/1/3/4/4/134467224/d19c173.pdfIn PDF document text
    • https://tilobumofiraji.weebly.com/uploads/1/3/4/4/134492377/dudavafekamunof_pinasapifir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416923/normal_5f9f695dd3f78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450156/normal_5fbc6ee568e29.pdfIn PDF document text
    • https://wapunukipebew.weebly.com/uploads/1/3/4/4/134440940/jipaxotinonuj-vavinuz.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/0be8f2a1-a324-4409-8507-a77d187130ee/alkaline_diet_recipes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3389f050-8201-4e9d-9f87-e2040458ddb7/40258038308.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d4858fa-dd4b-43a1-bed7-693f6ca6a384/93724392102.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/606570e5-8dea-4dac-a702-115e106e2ee9/game_guardian_latest_apk_84.0.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/31284851380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4cbe8c3-9c30-4380-b460-d803a085be13/lego_book_set.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34a60e34-58e4-4b8e-a254-e88bfcc71338/sapisisam.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_off0000fdda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDA 5092 bytes
SHA-256: f6bf476d29c4f19d2779455e0e64daf913f0a90794d7874bb8dabe1521671703
font_01_sfnt_off00010f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F50 10448 bytes
SHA-256: 40c3fa7665895cb6b086a0d5f35299b6ee9bcdbb706456a0084c40768cdf9f0f

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