Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad69d0823636ee3…

MALICIOUS

PDF

72.7 KB Created: 2020-12-19 00:08:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b3f11c7edf61b046e4f23954e8ac984b SHA-1: aa3c1613ad246abb2afe3c15c30cb56daddb7912 SHA-256: 8ad69d0823636ee30e006830e2e43766754139f73cd8601e260ca2f99460426e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing campaign. It contains a large number of external links, many pointing to other PDF files, suggesting a link farm designed to distribute malicious content. The document also includes instructions to disable security software, a common tactic in malicious documents. While no scripts were explicitly extracted, the presence of numerous external links and the overall detection profile strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://trafftec.ru/square?utm_term=kmspico+portable+windows+10+activator PDF link annotation
    • https://tuboxivodase.weebly.com/uploads/1/3/4/3/134387713/3756075.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500444/normal_5fcbd1d2b83b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489054/normal_5fc569122a8b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f8c10992013e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372737/normal_5f95ffaf1816c.pdfIn PDF document text
    • https://pixabetamomu.weebly.com/uploads/1/3/1/0/131070001/19f319f097a.pdfIn PDF document text
    • https://suvejuxib.weebly.com/uploads/1/3/4/3/134380783/poxopiwibeguwepasa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450631/normal_5fb01d417e7c6.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/begijufadi/lavukukewexaxu.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/jedolidupofijerima.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/98018526958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25f091e0-cefe-41f7-8ad8-e02b615d3e75/51955039767.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/iphone_7_plus_ios_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b826cbe8-64a2-4840-b3a9-35dc5f4e3ab3/jonezavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/808bd6d8-0659-40c2-a296-26e8ffd138ed/asphalt_8_hack_pc_download.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_off0000dd53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD53 5672 bytes
SHA-256: e96f34e48139131b0b17c79e5abfd6840563414d6bd228b54ef1a0b574f25ea3
font_01_sfnt_off0000f0a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A2 10936 bytes
SHA-256: eb19bdd7227d9c5fc3ac773d79b371469ad39189e8d0a06070114e1644ed29ea

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