Malicious PDF — malware analysis report

Static analysis result for SHA-256 89dec99dc9e10ae7…

MALICIOUS

PDF

114.2 KB Created: 2021-03-15 05:25:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 540ecb966d1a0d5b9e4f71f00218cb07 SHA-1: 87ff9f8023b62ff2102dd7189d846274a16c9d3c SHA-256: 89dec99dc9e10ae723661cba70adfd46bf874462bfaf61175e599f0417d2162b
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it is part of a link farm or used for phishing. The primary malicious URL identified is 'https://resalured.ru/wix?keyword=artemis+berlin+coronavirus', which likely serves as a lure or redirects to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/wix?keyword=artemis+berlin+coronavirus PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4490375/normal_5fe2d81be55be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376126/normal_5fefe4d7854a6.pdfIn PDF document text
    • http://xujukega.66ghz.com/tugavefori.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471682/normal_5ff0a5ebe204d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370090/normal_604cbd9035490.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412894/normal_6003fe8a54fa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446401/normal_5fe928325be18.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415068/normal_5fe5590a88983.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425487/normal_5fe3c77712c6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450260/normal_60032579ca970.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471273/normal_6044d8a4720a3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_fd9ba30615a94973bbf786cb205afedd.pdf?index=trueIn PDF document text
    • http://wupubobetob.epizy.com/digunalobudif.pdfIn PDF document text
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_b2bb479f6d8c4ee59ba1422da4655077.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3654eab6-1cf8-4b0c-98cb-9aec7e7a2d0a/dyson_v7_service_manual.pdfIn PDF document text
    • http://saderure.rf.gd/fifakaxut.pdfIn PDF document text
    • http://vavubal.epizy.com/android_rooting_apps_without_computer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d45ab20-e7a9-4200-9674-eb7fa81c67d8/6896679197.pdfIn PDF document text
    • http://wiwazisumi.rf.gd/delta_loop_antenna_radiation_pattern.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/970279e8-77b4-4963-b1aa-9fa4c4dfc994/menisitakozona.pdfIn PDF document text
    • http://wonumamirevaz.rf.gd/mesimuxifokuveveninojip.pdfIn PDF document text
    • http://tujijekaxevon.rf.gd/question_answers_of_chapter_7_packing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eefe87d3-8ce5-43f0-9e45-7f6e6860773d/85061062671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52ff17bc-a9bf-4872-bd6d-22981ea226c5/how_to_read_a_barcode_on_your_phone.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_off00017f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F32 5136 bytes
SHA-256: a720aeb26e8da928d8db77352e8f2a62d403d55dbdce345a3cd46aa1a62de17a
font_01_sfnt_off00019095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19095 12536 bytes
SHA-256: e2a4827e4223f76d70f1774b0240ca60a5b75775289b1c8894ee4953381fad68

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