Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca6d68f5a22b6b2d…

MALICIOUS

PDF

111.5 KB Created: 2021-01-24 10:48:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: da50d1ab4af8827aa6558c6079de353e SHA-1: 3b1135b2eec82171a315a8ae40681fe6cba3b5ac SHA-256: ca6d68f5a22b6b2dd66a3677bb8e035e7bf336eb9a93d105b67215f5d589aac3
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 4

  • 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://jottigo.ru/123?utm_term=el+papado+es+el+anticristo PDF link annotation
    • https://nawajutexi.weebly.com/uploads/1/3/4/1/134108687/duvoto.pdfIn PDF document text
    • https://xutepokukofegik.weebly.com/uploads/1/3/5/3/135391302/ac4e75c357c4e4e.pdfIn PDF document text
    • https://fafevidelaxikez.weebly.com/uploads/1/3/4/4/134481631/63572.pdfIn PDF document text
    • https://subusigigug.weebly.com/uploads/1/3/5/3/135316146/9213152.pdfIn PDF document text
    • https://cdn.sqhk.co/ritasuxa/jUdhdgg/rechargeable_batteries_with_charger.pdfIn PDF document text
    • https://sorasewemo.weebly.com/uploads/1/3/4/3/134358680/911db828.pdfIn PDF document text
    • https://rajepejejema.weebly.com/uploads/1/3/4/8/134860913/girixigibuxepowiko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nuvebuxuloruvux.epizy.com/102305411.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/tuwaxevolujaganovaju.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/toy_defense_1_hacked_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/tipakakegudobisefasadak.pdfIn PDF document text
    • http://finesegugumemo.epizy.com/emulateur_android_sur_pc_nox.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/detagitodesofuxiditedoki.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/android_tablet_covers_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/lakimiwijapizosozuzigar.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/behavioral_interview_questions_and_answers_for_internship.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_off000175cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175CF 5024 bytes
SHA-256: a01581e5f64e92d9a3f0e0f44762f097f4ac2ca69305ed0c863b62bc2339ddab
font_01_sfnt_off000186f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186F3 12540 bytes
SHA-256: bd55125eb6f4d750ec7b0310604875d13d8f247b1f64ab30a095f0529357c5ff

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