Malicious PDF — malware analysis report

Static analysis result for SHA-256 0835d60974bf92e4…

MALICIOUS

PDF

79.1 KB Created: 2021-03-16 03:31:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3ebdc78be3792ac5d90345257ca32da6 SHA-1: 28095eb52ccdbbd5a5b20f30e9876e5cf46d75f3 SHA-256: 0835d60974bf92e41fce56618a7b065c8d48c8fd28587daa84a2d462b257449f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains numerous embedded URLs, with several pointing to disposable hosting domains, suggesting a link farm or phishing attempt. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/wix?keyword=ffxiv+culinarian+guide PDF link annotation
    • http://pewadulojuba.mypressonline.com/sofiraz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500446/normal_60267fc752bf5.pdfIn PDF document text
    • http://zakosemej.mypressonline.com/vuzupewexagaripojemanez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473619/normal_602b2a1727d51.pdfIn PDF document text
    • http://wudaxozibutix.sportsontheweb.net/vicks_cool_mist_humidifier_filter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481270/normal_601a9dd59c962.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/harbor_breeze_saratoga_48.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/xikimuroxejopa.pdfIn PDF document text
    • http://nevugol.iblogger.org/garmin_s10_golf_watch_setup.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/7acea89f-d48c-43d2-a9a1-e75a1a4e42ed/how_much_is_tm_meditation.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/51853750547.pdfIn PDF document text
    • http://zidegegizuvodin.epizy.com/ecdc_measles_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8429235d-f005-4ad7-bb74-b7dceabd13a7/cissp_all-in-one_exam_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7569290c-4a2d-464c-bd52-e3edcf8e89d4/78514213603.pdfIn PDF document text
    • http://zumuwojik.rf.gd/gatiragiketowigozaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ca854f2-f838-44e2-a068-505280956a59/tedat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d080317-96c3-48a0-ac03-7a2d66ef431f/my_passport_ultra_4tb_price.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/63436218956.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/55422474713.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3baf2e4b-1db0-4c1f-bd83-bcac6d9af56b/imagenes_de_medios_de_comunicacion_antiguas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/349e97fc-db8f-4884-b662-d70024a530e7/vokebukepakemom.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_off0000f7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FD 5092 bytes
SHA-256: 5c85a8470526e7c04db885c525f998ddb853f86a404575e7eee2d87e2413ded4
font_01_sfnt_off0001096c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096C 11088 bytes
SHA-256: 43d9c23a3312ae4e308607af8f3b84be0c7dcd832d9229689c279b542392eb4b

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