Malicious PDF — malware analysis report

Static analysis result for SHA-256 59dfc0ffe085ae99…

MALICIOUS

PDF

80.7 KB Created: 2021-03-18 18:27:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 829d461f598c42f2dd577716b0af566b SHA-1: d736465f111e5aa26210916490806b499aea8ec3 SHA-256: 59dfc0ffe085ae997376c70fb401ea911920bb19b2ca42742ff8b91c00733c49
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/wix?keyword=the+manga+guide+to+microprocessors PDF link annotation
    • http://desawigoxikugaw.mywebcommunity.org/elements_of_statistical_learning_book.pdfIn PDF document text
    • http://kosonetibekub.medianewsonline.com/82970915753.pdfIn PDF document text
    • https://muwikilakejo.weebly.com/uploads/1/3/4/5/134519857/1531592.pdfIn PDF document text
    • http://tuzupibu.scienceontheweb.net/68218416232.pdfIn PDF document text
    • https://vuginavoji.weebly.com/uploads/1/3/0/7/130775358/juvopolikej-rutapifofo-samipesa.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/51715965225.pdfIn PDF document text
    • http://bipowilago.mywebcommunity.org/juborenufifaxijigux.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/70914060958.pdfIn PDF document text
    • https://masenajeronuzes.weebly.com/uploads/1/3/1/6/131637464/bd7b7f34528db.pdfIn PDF document text
    • https://duvujisukodat.weebly.com/uploads/1/3/4/6/134674851/0a59713b.pdfIn PDF document text
    • https://liwarelavoz.weebly.com/uploads/1/3/5/3/135398493/7418205.pdfIn PDF document text
    • http://xivetaf.22web.org/10095251410.pdfIn PDF document text
    • http://xuxijosut.sportsontheweb.net/64188539815.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://17673d3b-e5d0-4e0e-8211-f079fadf35f5.filesusr.com/ugd/13ae68_63ce39e617bb485fa5f689038cb0c49a.pdf?index=trueIn PDF document text
    • https://46b09160-81f9-4cb3-9cca-f7b5b0c0229e.filesusr.com/ugd/179cc6_db45bc2f93f44fbabd70279de4e4dcde.pdf?index=trueIn PDF document text
    • https://c6506652-bf5e-4f52-be36-03dbfaede22c.filesusr.com/ugd/f74919_a55d609b716d43df90e9f66bca644ec0.pdf?index=trueIn PDF document text
    • http://sakigekoxigukil.epizy.com/ikea_australia_catalogue.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/african_american_history_museum_in_washington_dc.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/59162124710.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/atwood_water_heater_gc6aa-10e_anode_rod.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/achievement_motivation_and_academic_performance.pdfIn PDF document text
    • https://3e1af3dc-cf37-4f58-935d-0a6065bc5ce9.filesusr.com/ugd/3ca236_720536757a2b4751b7ba0cdb808405ea.pdf?index=trueIn PDF document text
    • http://bikikifuxax.epizy.com/masuluzudugelapatibovap.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE478 5404 bytes
SHA-256: c18a775c5a07c95b4994c2d7da3049027111cbed389c860c30e7176935288442
font_01_sfnt_off0000f6a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A6 11204 bytes
SHA-256: c7e3ebe0bba4c25aa033baa818fbffad3c5aaed3c3cc8340ccd73123b28c7a67
font_02_sfnt_off00011d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4E 16392 bytes
SHA-256: 954f30c1cce2e3a00f07cb0ababb04bf86a3a3c34ed8da2fc782bdc014231390

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