Malicious PDF — malware analysis report

Static analysis result for SHA-256 a566a414cdaf0297…

MALICIOUS

PDF

75.2 KB Created: 2021-03-28 00:15:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 704d3245a6cdb1989399108822aebd59 SHA-1: 4ed52d7f505716dca00e4bdc3a61bbfe2e3d20d4 SHA-256: a566a414cdaf029769b051f3259dec5f6d9b39d47e176403e0a43500c30392a8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://xajibur.ru/award?keyword=mechanical+engineering+psychometric+test+pdf PDF link annotation
    • https://metogixum.weebly.com/uploads/1/3/0/7/130775033/1797672.pdfIn PDF document text
    • https://werevofapopaja.weebly.com/uploads/1/3/4/4/134492388/6112953.pdfIn PDF document text
    • http://kedejusofapirej.22web.org/55470029459.pdfIn PDF document text
    • https://bogexisamalalu.weebly.com/uploads/1/3/5/3/135320210/1b0af3b.pdfIn PDF document text
    • https://gegaminowudajun.weebly.com/uploads/1/3/4/0/134041134/909159.pdfIn PDF document text
    • https://gotedimonov.weebly.com/uploads/1/3/4/7/134761190/fuwunogefoges.pdfIn PDF document text
    • https://poxuroli.weebly.com/uploads/1/3/0/7/130738943/lavutafex.pdfIn PDF document text
    • https://vepibasizux.weebly.com/uploads/1/3/1/3/131380915/soxodisavixowibomu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ce322291-b3da-4cc2-ae0f-523e25daec44.filesusr.com/ugd/4530da_188bc62f3e654846b3f9dbaa2084f14a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/paramahansa_yogananda_kriya_yoga_technique.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5366bd1b-1439-481c-bf1d-f6f322e42e2f/the_bloody_chamber_book.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/imo_calling_app_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/weather_report_live_today.pdfIn PDF document text
    • http://kasedabinat.rf.gd/72870443995.pdfIn PDF document text
    • https://e082cb0d-9c22-4a21-acb7-e2c6127a51d3.filesusr.com/ugd/ff0c06_a57149096a1d43f285adea70b65abbf6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3eacdfe-5c1f-42e2-b9f7-61174ce58993/94187091195.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/why_isnt_my_samsung_fridge_dispensing_water.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7e2fe67-1fd8-4e49-ab2c-d89f7871307d/how_to_make_a_scatter_plot_graph_on_microsoft_word.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/simple_indices_questions_and_answers.pdfIn PDF document text
    • http://rasupaxuxogip.epizy.com/buen_inicio_de_ao_escolar_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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE898 5676 bytes
SHA-256: f3da32f08215a30b98d3f35d05eab7ed2e5f2895662f09b82f7ecfb245eb6b51
font_01_sfnt_off0000fbd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD1 10500 bytes
SHA-256: fd8c76b32234b38b804ff0d76ecf9b6c50d5c5645ac660519507139b2f243e1b

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