Malicious PDF — malware analysis report

Static analysis result for SHA-256 c91236897840b29b…

MALICIOUS

PDF

70.4 KB Created: 2021-03-06 04:42:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: fb92c824389ec5616a76a8a52ec8a4d6 SHA-1: 50ea5f164a9db6789ae6d955bcf2464bbb62fd1c SHA-256: c91236897840b29bc443be4ea1042b9f2404d36d7804e8d3325c8846822b9635
184 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=coleman+powermate+4000+watt+generator+manual+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4393759/normal_5fdeec416e6bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490722/normal_6011e5aa38bb2.pdfIn PDF document text
    • http://lofitner.buzz/wetakozumakefixu0hma6.pdfIn PDF document text
    • http://bit7.top/bacterial_meningitis_treatment_guideliness3vb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488332/normal_5fd9654f3ec66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379048/normal_5fddf67217270.pdfIn PDF document text
    • http://opticsystem.website/xadowoltsmwe.pdfIn PDF document text
    • http://sobakin.space/snapple_facts_memewpldp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426819/normal_602d7158b5b7a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bivuraxut.rf.gd/game_black_hawk_down_ps2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3982e8ad-0e3e-4b6a-8013-f70d30e1eb95/80872498706.pdfIn PDF document text
    • http://povusesa.rf.gd/que_enfermedad_causa_dolor_de_huesos.pdfIn PDF document text
    • https://c31d65df-273c-4bcc-acfb-7b03b0724b99.filesusr.com/ugd/e7e4a0_e6c5ec4724774d43a29fcbdb1531982e.pdf?index=trueIn PDF document text
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_33e94877d3544288b87dc05555422744.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/algebraic_fractions_igcse.pdfIn PDF document text
    • http://wiximevisek.epizy.com/xuzufosem.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/bayan_video_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0832bd8-b8ce-42ca-be92-515cadf5f8bc/how_to_cite_a_case_study_in_apa_format.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_off0000d707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD707 5412 bytes
SHA-256: 2edb5531e306455e2ea68a1684c43c8a96dd7e07a104e13b98970f99312a4c76
font_01_sfnt_off0000e96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96A 10032 bytes
SHA-256: 6bc837a70aa0f2a83923cbe57134ab112376e3e670e0847c57e635fbd60468fd

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