Malicious PDF — malware analysis report

Static analysis result for SHA-256 978ed8b1d7f7fbaa…

MALICIOUS

PDF

73.2 KB Created: 2021-04-02 01:41:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: feee75add0f7eb08d88599d9dc4ec201 SHA-1: 0b3b28538891fbe6b6d341d54dae6f46614992b6 SHA-256: 978ed8b1d7f7fbaa993a2f5c70eef9b0b93378808f8afb6bae4871b533e2c970
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a phishing or link farm operation. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to potentially harmful websites.

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 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://resalured.ru/award?keyword=adjective+list+pdf+with+meaning PDF link annotation
    • http://replyua.site/14317934921p3xe6.pdfIn PDF document text
    • http://noverst.xyz/xadexirujmxfsj.pdfIn PDF document text
    • http://zoom-omsk.ru/fibitodikagopagitqlo11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470837/normal_5ffc85ffd08be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418566/normal_5fdd416db4d3e.pdfIn PDF document text
    • https://lofivate.weebly.com/uploads/1/3/4/3/134307733/nibowizinalipexanu.pdfIn PDF document text
    • https://tabikajodunel.weebly.com/uploads/1/3/0/7/130739544/56ef7886c3d682.pdfIn PDF document text
    • http://cupe1.ru/evangelio_apcrifo_de_juanjro9f.pdfIn PDF document text
    • http://gratoraama.website/fanenelonutiwovuxoi73df.pdfIn PDF document text
    • https://vulodimov.weebly.com/uploads/1/3/4/8/134880101/f6a57637.pdfIn PDF document text
    • http://indital.fun/vesizonqsksk.pdfIn PDF document text
    • http://optalpha.com/kebuvurumanetagituww8jat.pdfIn PDF document text
    • http://lijonotogi.scienceontheweb.net/guide_to_wireless_ad_hoc_networks.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bavatesivo.myartsonline.com/gallbladder_foods_to_avoid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38176068-9fd0-4460-b37c-4d10cbc9c623/roxefeburadabobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8627d4b8-2ee8-4f3a-96d0-3276988655dd/how_to_clean_oster_coffee_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f73c7b3b-bc5a-49e5-9279-633328a1fdc1/77845531923.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/741617e1-d0e3-428f-9cbd-c7409aba8ba6/11436610910.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4e0a73a-4fad-4242-a8eb-193f01e6f5ab/nys_driver_license_renewal_covid_19.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_off0000e13b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13B 5688 bytes
SHA-256: ac86e7fc2ed5ce550bf2b0f611cb8b4444a1956f4248cc9d6040b26de59110ce
font_01_sfnt_off0000f48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48F 10396 bytes
SHA-256: 1188881d7d556d75572700eea6a9de44e75a3e7ad0c8e18bc147d04583ffcd0a

Open this report in the interactive analyzer, or submit your own file for analysis.