Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8c970ad9d3f34e8…

MALICIOUS

PDF

78.5 KB Created: 2021-05-17 22:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 4b7e30e9ff63c4ed061a40c94b729687 SHA-1: 92bbb8f3cd25a991fdd781ecc0dc7f7d59523c58 SHA-256: a8c970ad9d3f34e8a8616ecd183af2853ec7e5d0d3a971f54e178342c9efc902
126 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 threat. It contains numerous embedded URLs, with one prominent URL pointing to 'botokaw.ru' and disguised with a movie title in the UTM parameters, suggesting a lure to a malicious site. The PDF structure and embedded links are indicative of a phishing campaign aiming to trick users into downloading further malicious content or visiting compromised websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://botokaw.ru/strik?utm_term=frozen+2+pel%25C3%25ADcula+completa+en+espa%25C3%25B1ol+latino+2020+hd PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366005/normal_6001c74bbc928.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409254/normal_5fdcae1c18ce2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368468/normal_6046558e087f3.pdfIn PDF document text
    • http://xatulap.22web.org/nimiveruvakazuvis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384030/normal_5fd84758ba075.pdfIn PDF document text
    • http://vuxuvex.iblogger.org/59150839816.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369150/normal_5fec408e1d418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410020/normal_604635bde553f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372963/normal_5fee7e6e8502a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483081/normal_6065e2b8e8ac5.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/70067658-266d-42b3-bd03-dac404ffb291/93875574907.pdfIn PDF document text
    • http://nalejunubotuw.rf.gd/achievement_vs_ascription.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8acffb13-3ece-4af1-b28a-e199d7d9f1bd/feliz_navidad_lyrics_in_english_by_boney_m.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/424251ea-8842-4184-a829-d5734d8c91c1/how_to_apply_disability_pension_in_delhi.pdfIn PDF document text
    • http://vutitogox.epizy.com/bofid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5ada0c7-d9b9-4fe3-a3bb-133b5075eae7/manixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f36347c-77ed-440c-baaa-8153351674af/pikuwubebinodedoselux.pdfIn PDF document text
    • http://vurukovejetaz.epizy.com/48774590168.pdfIn PDF document text
    • http://bujapaf.epizy.com/25985644407.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0862a21c-4a3c-4a49-a5d4-6e1f5bfdf9af/what_happens_if_your_drivers_license_expires_in_sc.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_off0000f04e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04E 5860 bytes
SHA-256: 36372fd3f050fc142fa92c41b811b93c726fc3d96d3740a657c6cda01ea0c21a
font_01_sfnt_off000103d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D0 11872 bytes
SHA-256: df510a60bf630bbf547e80d19704877e7dcff7d1763dbc95d1a5653f72fed3b5

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