Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e1ae0b16b961575…

MALICIOUS

PDF

62.7 KB Created: 2020-11-17 15:14:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3c103c43d3cd352d6076ac40ac469bc4 SHA-1: d3df62251475ab3092d9cf742017fccf2ebc0ef6 SHA-256: 2e1ae0b16b961575f231a9f366f3da1064d521a5295a6e68bc6922fb3bf1dc98
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://traffnew.ru/123?utm_term=lloraras+oscar+de+leon+lyrics+english PDF link annotation
    • https://bafonalilazuxi.weebly.com/uploads/1/3/4/7/134731076/gilimewiximif.pdfIn PDF document text
    • https://pelixenebedevo.weebly.com/uploads/1/3/4/3/134338689/rizuzexusoduporej.pdfIn PDF document text
    • https://piziruzebizopu.weebly.com/uploads/1/3/4/3/134350425/deditosor.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/e25b106b-8588-45fc-89b4-ee29c9c584b6/ejercicios_con_uso_de_c_s_y_z.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/magagedenosizofotefedikag.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/caccia_al_tesoro_nell_universo.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/battle_over_berlin_2_2019_pomu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc19837c-6451-4e8d-a884-4fd4507f7237/92207727051.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/mokofawibokaxazesota.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ada9169-9c66-49b3-94f5-187dfe485dbc/besapanekalanuginabiwos.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/metformina_efectos_secundarios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffdded56-061e-4e0d-9e56-c5dc942e8d5d/95175934744.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/microsoft_access_2016_programming.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/call_of_duty_mobile_apk_latest_version.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_off0000b855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB855 5244 bytes
SHA-256: 452ed3e49b65e203ccef8e83192d146596879a1113fec1a2017611941ef403ed
font_01_sfnt_off0000ca27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA27 10920 bytes
SHA-256: f4514131d7c0532dc47ea4fc94d3f70cbecbb03627d2b4ba973bb6076229be77

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