Malicious PDF — malware analysis report

Static analysis result for SHA-256 5846effea47b643d…

MALICIOUS

PDF

80.6 KB Created: 2021-06-04 15:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b7cdb874157c75fd264d88c5d7014dba SHA-1: d5b3f0e5fb12ae413026712048fa94d98ca030d1 SHA-256: 5846effea47b643dad030044624a40f0da6cdbcf19959a111be14bc538856323
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL, https://crewmak.ru/pbw?utm_term=how+do+i+reset+my+otium+bluetooth+headphones, is likely part of a phishing or scam campaign. Although no scripts were explicitly extracted, the PDF structure and the presence of external URLs suggest it's designed to redirect users to a malicious site, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/pbw?utm_term=how+do+i+reset+my+otium+bluetooth+headphones PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371809/normal_6031b403a18cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464078/normal_5fdad9b907937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385417/normal_600f77fd13327.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379606/normal_6031117a6e058.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4488092/normal_60affef02dfa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482407/normal_5fd0b76dd299f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496151/normal_60175feacd2be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467019/normal_602575d10f1f3.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/c7d9b528-8539-4d97-959c-e68a51356eac/45918678828.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09e35847-0a7c-4df5-b8bd-2f844d6ea11e/tinikoxodidanewisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c14edac2-886b-4495-a444-8395cab187d6/pepewagupigakafumupubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dff305a1-5ffc-46e0-bf76-8013483c1543/native_american_agricultural_revolution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfcf0ff1-4c8f-4714-b0c2-40adf9fe06ae/95259756038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c444b066-f12d-4a2b-b0dd-134ad1b5b4f7/the_creative_impulse_an_introduction_to_the_arts_8th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d010d15-f821-46bc-9d18-1861e22b1665/58706221435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a96332c0-f043-4d33-b0ba-900e597fa62a/what_does_604_mean_in_numerology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63e26173-399d-4774-98e3-1d8dd8e9a720/gejuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e84c6d1-594a-4bd4-83ce-20145ce36059/4889241245.pdfIn PDF document text
    • http://niluputevi.pbworks.com/f/windows_server_2012_iso_file.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d33b398-e8dc-4909-b331-9472c3268d3f/20456799110.pdfIn PDF document text
    • http://ziduzobif.pbworks.com/w/file/fetch/144467145/92899490347.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_off0000fc8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8B 5492 bytes
SHA-256: 8505435e437eced52960d0773c719e4d20435129017ac6355891b659646afb82
font_01_sfnt_off00010f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F14 11120 bytes
SHA-256: 9ed11f7a3a78d2a7f40699344734e3f0122195564e6c419905327ecc23e06f58

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