Malicious PDF — malware analysis report

Static analysis result for SHA-256 e61066984b1b2dd8…

MALICIOUS

PDF

168.8 KB Created: 2021-05-28 15:25:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: bbfadc81864400f80bad49486b3481cf SHA-1: 9ae82012562e1666a47af32d4f434f8ac5f10719 SHA-256: e61066984b1b2dd85e103a8fc48569cb5ef4e2e2dc5dfdb3d3c08cc1dc093180
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect users to a malicious site. The document body, though heavily obfuscated, suggests an impersonation of a government portal to trick users into visiting the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/strik?utm_term=portal+primaria+tic+http+%252F%252Fbasica.primariatic.sep.gob.mx PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4405194/normal_5fca57721db21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463034/normal_5fd172af52572.pdfIn PDF document text
    • https://gobalubige.weebly.com/uploads/1/3/5/3/135339343/5486372.pdfIn PDF document text
    • https://garovinarabibaf.weebly.com/uploads/1/3/5/2/135293384/570821.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406166/normal_5ff0afb1e61b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489041/normal_5ffd53bb79b14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365642/normal_5fddf8d519f5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382621/normal_5fefaa04e2e02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407084/normal_5fee833928ef4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461211/normal_600387a39b47e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474723/normal_601daf480d9bf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/80b97be0-8714-4778-9d43-f3fea34471a8/runatokofepidulek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/273d6b7b-c244-41e3-9d2a-feac188a092b/9904380191.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a94e658-2802-4b28-8b08-cefb42e325a2/vutipuposavutaxiguwowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13d12a88-1c42-43bd-84aa-5c879d383c4d/yard_machine_riding_lawn_mower_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d76e85-e843-4133-a6dc-0be100129508/witizaxetikenap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bea9f99-f828-4796-a563-c8e67a082808/wapemofasajibole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9cb8e72-24c3-45e3-90bf-66b734461a47/60121879268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88bdb8e3-73b8-4d73-9bf3-fe38cc370873/dilapimidaliwaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e233efe-a1a1-4452-9cd5-a88f1d6bf868/89646958936.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58e11278-f7cb-4fac-be4c-52f0a53c8b41/soundlogic_xt_bluetooth_rechargeable_true_wireless_earbuds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72a39c3c-3712-43bd-becd-58d731294511/time_management_tips_videos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3777c7e9-970a-463f-ad36-1735a6173643/xitumedotojuroxuzemufino.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_off00023e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23E17 5624 bytes
SHA-256: ff79f9522ecf028c42daa092014338dfd5d17170101802b2c7a7cf259f4e981d
font_01_sfnt_off00025114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25114 13940 bytes
SHA-256: 5cc4e041f6403af8cd88ead998f7788f37ff0d291971b5e27f38f79d8b92275c
font_02_sfnt_off00027d98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27D98 16140 bytes
SHA-256: 1ffca1ef16be5e2ec436e77f9211a88ad3199dc781cb76600401cc2e2c7dce6d