Malicious PDF — malware analysis report

Static analysis result for SHA-256 e38a2d643ccdf387…

MALICIOUS

PDF

73.1 KB Created: 2021-03-06 19:07:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dd5db801c67cd3106e46e79e7c269302 SHA-1: 545e04438b24d6daac3510f4172f81e2fa62d74d SHA-256: e38a2d643ccdf387fe7c86b8b36ecf07def11d6cca69a2f2724d3742176ad625
156 Risk Score

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://resalured.ru/123?utm_term=how+to+make+creamy+cajun+chicken PDF link annotation
    • https://zufunukilaje.weebly.com/uploads/1/3/4/8/134888690/37b2e58a7496.pdfIn PDF document text
    • https://jeduwisuduxib.weebly.com/uploads/1/3/1/4/131483356/bbc056bc33.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/los_rios_de_color_purpura_2_dvdrip_latino_mega.pdfIn PDF document text
    • https://xexajuxeleseg.weebly.com/uploads/1/3/4/5/134592224/jiwefezevofulal_fekaxatepebixan.pdfIn PDF document text
    • https://xumagatovonag.weebly.com/uploads/1/3/5/3/135312495/d51c9261.pdfIn PDF document text
    • https://xuzizalebu.weebly.com/uploads/1/3/4/7/134772475/nesezusugakapob-sexabis-rovuvopafote.pdfIn PDF document text
    • http://sewawena.scienceontheweb.net/medios_de_comunicacion_salvadoreos.pdfIn PDF document text
    • https://lufisadoxusixa.weebly.com/uploads/1/3/4/5/134583632/towogareduvezet_fufopoxadowu_bewujojatix_nolodago.pdfIn PDF document text
    • https://voxasofipazo.weebly.com/uploads/1/3/1/4/131407247/d1e25793.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/ponerajitujisibijate.pdfIn PDF document text
    • https://00eaa6b3-f026-4720-b00f-fafb40066352.filesusr.com/ugd/d498be_bbbedbb13f3145539f5bda59ff5fbc78.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/28573433269.pdfIn PDF document text
    • https://54570836-76ea-4100-b78f-d1ba4c3cc0d1.filesusr.com/ugd/21ac59_56ea37af171140239fd4f50a01b5e801.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/patilawasu/banjo_movie_music_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/97215197279.pdfIn PDF document text
    • http://nukilaba.myartsonline.com/how_to_adjust_bipap_settings.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/xuderufure.pdfIn PDF document text
    • http://sidepojedava.myartsonline.com/stevens_320_field_security_12_ga_28_barrel_5-rounds.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/ipcc_report_2018_espaol.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_off0000e166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE166 5124 bytes
SHA-256: 113c2cef8ca192e59eb384d730a32eec7bc4308ba6b489da152d5bc8b6a13229
font_01_sfnt_off0000f2bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BF 10872 bytes
SHA-256: bf0daf7c19b035b7be2ac2703ad6e5569a8599a1c66b0af0bc9ddd079335e25d

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