Malicious PDF — malware analysis report

Static analysis result for SHA-256 b869b491822d9714…

MALICIOUS

PDF

77.2 KB Created: 2021-03-14 14:46:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 662619ce82399b12000b5ed725e18fa2 SHA-1: d6f71bd9f6a165291f37c47bd00d8439e09db543 SHA-256: b869b491822d971406c65ddf44aa65b449c762b7b36d947fe7f88f0929518438
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 or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to income verification, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=proof+of+zero+income+letter PDF link annotation
    • https://cdn.sqhk.co/tagisaxozof/hjcrgg0/31229718826.pdfIn PDF document text
    • http://xonigej.mypressonline.com/petusokaxekuruxuju.pdfIn PDF document text
    • https://cdn.sqhk.co/duvapegoleva/jbDifjg/polytone_music_definition.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/how_to_day_trade_using_thinkorswim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406771/normal_602d86c79dfc0.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/87963077331.pdfIn PDF document text
    • https://cdn.sqhk.co/woxekivepi/fjeriaX/cricket_wireless_plans_with_hotspot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467912/normal_60273d42d2014.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464735/normal_600d45b6d451d.pdfIn PDF document text
    • https://cdn.sqhk.co/lofesaxudiwo/UFgfVW9/fr_legends_livery_codes_rx7_fc.pdfIn PDF document text
    • https://cdn.sqhk.co/wezopexa/BFhbSdN/77923083507.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382793/normal_603f1d008d595.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/dYM1EwA/xatudolevudi.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
    • https://s3.amazonaws.com/datarofapakil/kudeganopadajuxekuxezu.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/practical_clinical_skills_ekg_reference_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/24246932525.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/avast_virus_definitions.pdfIn PDF document text
    • http://likewiwojuxus.atwebpages.com/cancionero_de_cuecas_para_guitarra.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/zebog.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_off0000e2e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E3 4480 bytes
SHA-256: 07d398d88c6d5fb8091b9dbf980feb6e6f639e1ef27fb0c6259a7556d3d289cd
font_01_sfnt_off0000f1f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F9 11116 bytes
SHA-256: da93f3b7a8dd30ddb374b169d749ca8474931838b0903f2f2ba162a9abfa4d3d
font_02_sfnt_off000117d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D8 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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