Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8f4da5afdcd0cf5…

MALICIOUS

PDF

68.2 KB Created: 2021-03-13 22:10:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3f028de3298555f778303e4ea100e54c SHA-1: 9d9d758ddcbabf27d6b11a6682bf5cb349261ea3 SHA-256: a8f4da5afdcd0cf5bceae90ed08655841dae207539df7c20f79c48888b776755
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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=antas+ng+wika+worksheet+pdf PDF link annotation
    • http://bukapim.mywebcommunity.org/57636029135.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426062/normal_603c8607379cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414167/normal_5feec7fdd4989.pdfIn PDF document text
    • http://naxajogilelog.medianewsonline.com/jubutagawozeratu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nujemapamonaj.epizy.com/lagu_free_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/61657334760.pdfIn PDF document text
    • https://e6676b24-921d-4f57-8fca-beda98688f3c.filesusr.com/ugd/144d27_4eacb89ed6924da6a292bbd95d000f5e.pdf?index=trueIn PDF document text
    • https://f07eb630-23ff-4298-a1df-d7940f1ba2dc.filesusr.com/ugd/097a5b_f286247eb50541fba2478ae95f557d95.pdf?index=trueIn PDF document text
    • https://488a161d-122f-4e25-b35e-34d1d0e27b34.filesusr.com/ugd/bbc910_f7e3468292c04eca96854e71869408a3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/american_history_textbook_mcdougal.pdfIn PDF document text
    • https://ac263381-fdad-4fda-ae78-6df6d71032d6.filesusr.com/ugd/25c42e_9e58d5961eb9406fb00939870a32dd4c.pdf?index=trueIn PDF document text
    • http://kigizeme.epizy.com/evaluating_algebraic_expressions_worksheet_grade_8.pdfIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_dcef08156b3f4a82b23c449c92c5bed7.pdf?index=trueIn PDF document text
    • http://fobapisarut.epizy.com/fixed_assets_management_project.pdfIn PDF document text
    • http://rapudipawuv.epizy.com/wondershare_editor_download_blogspot.pdfIn PDF document text
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_09639431914c4755bb77150642b5e64b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/yoga_asana_app.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A0 5204 bytes
SHA-256: 740ac7db8417b214bf032ba39c3f29f3b053220090913cd47b42bf25b77a324e
font_01_sfnt_off0000d558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD558 9572 bytes
SHA-256: 1fafba574b8cc4f91cac99d71b183b9a97ea715c33e59a71a97aa4a4a8162590
font_02_sfnt_off0000f612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF612 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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