Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e9303f120669329…

MALICIOUS

PDF

70.7 KB Created: 2021-02-08 06:27:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c8ad0e7dce9cc7181e2b6c7a4014bf0c SHA-1: ee5e8f76c6498b2fc6e55569e87a8478e713b2b6 SHA-256: 1e9303f120669329f37210574d7b004514ec3b21653eef7ce589db48c1eee5be
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's used to redirect users to potentially harmful sites. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/aws?utm_term=eminem+crazy+in+love+song PDF link annotation
    • http://bhd-management.space/77622066013vnpp.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/2ichj9W/emergency_dentist_nyc.pdfIn PDF document text
    • http://zujonatuvetivux.iblogger.org/jijamivajotuja.pdfIn PDF document text
    • http://ig-about.net/vudemogisixugijojijs079g.pdfIn PDF document text
    • http://eferevole.com/97349477780nztnb.pdfIn PDF document text
    • http://merogerofame.66ghz.com/past_continuous_affirmative_negative_interrogative_exercises.pdfIn PDF document text
    • http://rowozogano.22web.org/70244514245.pdfIn PDF document text
    • http://gazzsheff.xyz/udacity_capstone_project_androidyhfsc.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/idGYqN0/survivor_tv_show_casting_call.pdfIn PDF document text
    • https://cdn.sqhk.co/joxopejufito/hhljbXq/vuvovudubedi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473379/normal_5fe855773b2d1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://marakolin.epizy.com/chocobo_racing_ps1.pdfIn PDF document text
    • http://varoniwarovez.rf.gd/multiplying_and_dividing_integers_questions_and_answers.pdfIn PDF document text
    • http://xibupafuvobiluk.rf.gd/adobe_audition_cs6_pc.pdfIn PDF document text
    • http://jezagap.epizy.com/arjun_pandit_movie_mp4_video_song.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_off0000d6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A7 5288 bytes
SHA-256: 0c2379993f73eb79ac1a6a3f2eac94f6c717c4e9bcbadcf130ff2488468a95d0
font_01_sfnt_off0000e8aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AA 10904 bytes
SHA-256: 75af3d4e016572c70433edd615178da3578c79712f307109bfd6442caf8f3acc

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