Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e2e2cda5b56258…

MALICIOUS

PDF

77.2 KB Created: 2021-03-13 21:59:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f10545cfed8d2fe62d07f74a5c7f0a74 SHA-1: 54d81ae5664b23a066f492df643cf8e372f66691 SHA-256: 00e2e2cda5b56258ffcb57be12d77f010a7042c3df09e8157dd9e622294f1c51
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, suggests a lure related to learning Spanish. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via a redirector.

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=aprender+espa%25C3%25B1ol+pdf+gratis In PDF document text
    • https://cdn-cms.f-static.net/uploads/4425924/normal_602eccad8cd9b.pdfIn PDF document text
    • https://wajupinafuju.weebly.com/uploads/1/3/4/7/134752356/3977d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409840/normal_6045bd8e1c7c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470537/normal_603deccb4a646.pdfIn PDF document text
    • http://refoxedij.iblogger.org/7478120670.pdfIn PDF document text
    • https://vifawadezak.weebly.com/uploads/1/3/4/8/134846548/remowakakud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393485/normal_603e19b0c6117.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://merekum.rf.gd/solubility_curves_worksheet_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7107d790-92a6-4a83-a93f-396b1fbc49dd/fundamentals_of_probability_with_stochastic_processes_3rd_edition_solutions_manual.pdfIn PDF document text
    • http://sewexojin.rf.gd/excel_vba_see_if_sheet_exists.pdfIn PDF document text
    • http://radujexoxetapil.epizy.com/kedotedorijoxeb.pdfIn PDF document text
    • http://rizaxofu.rf.gd/75254237144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b6aa9f5-548a-4cba-9eb2-61ba787d293f/35439961577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62655917-f4f6-44f1-9b31-8374bb007131/48148845600.pdfIn PDF document text
    • http://lijutowefat.epizy.com/what_does_yo_yo_dieting_do_to_your_body.pdfIn PDF document text
    • http://fozilixugijuva.epizy.com/corelogic_report.pdfIn PDF document text
    • http://biguvuxurezuto.epizy.com/videxulofoselupesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a750d795-4233-4fda-93e9-4c80c4aabd95/dutuzijubodewej.pdfIn PDF document text
    • http://labofowidora.epizy.com/14040574322.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_off0000e02d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02D 5408 bytes
SHA-256: 07f299807c961c612fd43ee18dd3417a94e9f44183696b90714b254c4caacee5
font_01_sfnt_off0000f25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25A 2664 bytes
SHA-256: 28d9aadca2ce3537dc1b08aa02ade50f061ec263f30520fa6600f96b0bcda45e
font_02_sfnt_off0000fdaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAA 12252 bytes
SHA-256: 1451cfa2e1bad28761ff4a3c9503703f2e6834cbf69dc1059e00e28d75f98f26

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