Malicious PDF — malware analysis report

Static analysis result for SHA-256 303759ee423d324a…

MALICIOUS

PDF

86.4 KB Created: 2021-03-04 18:08:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 6dd846f2f5a3619ac8dd51e82f428b7d SHA-1: a47c748bb3e7a5f5182151e51bcc3f8789f5b133 SHA-256: 303759ee423d324aa5fb55c6b9c02a4b754c14f03a3c5643cf74e7c2b6e5e25d
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs pointing to disposable domains, flagged by heuristics as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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://maypoin.ru/123?utm_term=how+much+does+apple+dividend+pay PDF link annotation
    • https://zasevolonuto.weebly.com/uploads/1/3/5/3/135335071/nilelurupi-gujiwotafu.pdfIn PDF document text
    • http://womenit.space/unit_6_lesson_1_relationships_between_quantities_answer_keyumi48.pdfIn PDF document text
    • http://yourlivehelp.com/guluvibabu7okxd.pdfIn PDF document text
    • https://vutojakapejir.weebly.com/uploads/1/3/4/8/134895653/rofupaxiwatule-gafagujunuxiv-gikupigibuwi.pdfIn PDF document text
    • http://magic-spring.com/jopapuvekisupiparo9pbys.pdfIn PDF document text
    • http://passive-income.ru/basigiwopogaxofekebar48wc.pdfIn PDF document text
    • https://jigurojo.weebly.com/uploads/1/3/5/3/135321607/pumezutelaze.pdfIn PDF document text
    • https://xepesirivow.weebly.com/uploads/1/3/1/4/131408502/e0997.pdfIn PDF document text
    • https://turetufifej.weebly.com/uploads/1/3/4/5/134500159/5276437.pdfIn PDF document text
    • https://disadoxamegipu.weebly.com/uploads/1/3/4/5/134527150/fikemot_boxunifitawis.pdfIn PDF document text
    • https://mozawexi.weebly.com/uploads/1/3/1/8/131856146/5577706.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/garorowa/mosaxoka.pdfIn PDF document text
    • http://jofesosozofoso.epizy.com/hold_the_line_toto_piano_sheet_music.pdfIn PDF document text
    • http://marilineme.epizy.com/nefusadujidil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98727872-87a7-45e6-b544-cf8e5a0a0c4c/what_happens_when_a_lead_acid_battery_is_overcharged.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/hello_tune_application.pdfIn PDF document text
    • http://mimitudoxofi.rf.gd/xitirisolafekoxivasirebep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c826ac1-58c3-487d-91ba-1de2dccfe027/dlink_dir_615_default_wifi_password.pdfIn PDF document text
    • http://zotomogizolelaz.rf.gd/definition_allotropic_forms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a4bf36a-0b06-43c0-acbc-f215d0397c78/81331589357.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/assam_university_online_form_2018.pdfIn PDF document text
    • http://xonotexeg.epizy.com/bellevue_ne_water_quality_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8da97b62-eb56-478c-8200-b56d2cd4e2e5/hillsborough_county_public_schools_holidays_2019.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_off000114c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C6 5432 bytes
SHA-256: 39915f60f0ec545c36261e050bf00f3de1d73e01916a116686122aa27d415b9b
font_01_sfnt_off00012739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12739 10692 bytes
SHA-256: d463d422cd9ee48365f630d802a34ae2a0762505b5ffa4875ed1e774e62f0f4f

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