Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3796f94ef2a63e7…

MALICIOUS

PDF

107.2 KB Created: 2021-04-18 11:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8d93a2e52ead8765da3bd24d2c29a785 SHA-1: 248db1ab4a09ad3024eece88121d614780e718a5 SHA-256: a3796f94ef2a63e7b45576e8b9488347ceaa754d934be8ae280caa1847531f79
126 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 phishing attempt. It contains an external URI pointing to a suspicious domain, likely intended to redirect the user to malicious content. The document body, though heavily obfuscated, contains text related to movie reviews and application metadata, suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://maypoin.ru/strik?utm_term=silence+of+the+lambs+movie+reviews PDF link annotation
    • http://zagufupilafuw.iblogger.org/are_samsung_washing_machine_pedestals_interchangeable.pdfIn PDF document text
    • http://baxagaxisatipa.22web.org/eventide_h9_bass_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://maxitopatedawo.rf.gd/portfolio_one_page_template.pdfIn PDF document text
    • https://e50eee24-2d95-422d-8083-6f618d95927b.filesusr.com/ugd/594ae5_d4846da104344f7ab6d6c648b68680f3.pdf?index=trueIn PDF document text
    • http://vedomoz.rf.gd/99022954687.pdfIn PDF document text
    • https://27475d5a-2981-497d-8cd5-0c310ef10f8b.filesusr.com/ugd/9cb927_28463e01b51f48bbac31cc0bfe527c44.pdf?index=trueIn PDF document text
    • http://felubumasosazi.epizy.com/98363540625.pdfIn PDF document text
    • http://jeburam.epizy.com/1861359066.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/feluk.pdfIn PDF document text
    • https://4de1274e-a26b-4e71-a0d1-d86f0cfee7ee.filesusr.com/ugd/ee4d88_718344c5d4564a4ebd28ffd7e553d244.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4036f94e-ce85-4fd8-a8e6-7deaa4199ed9/nuvepi.pdfIn PDF document text
    • http://makuvekate.rf.gd/diono_radian_rxt_rear_facing_weight_limit.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/dexuganumazowuwoj.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/figogiwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb063d66-609c-424c-861c-4962721154a5/40578932004.pdfIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_2ac74ee143fb4008b0ed8a7eb91864fd.pdf?index=trueIn PDF document text
    • http://fikokelu.rf.gd/child_care_leave.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/crystal_reports_viewer_older_than_9.pdfIn PDF document text
    • https://0f926834-650c-4d5a-b53c-ad60ae412ccc.filesusr.com/ugd/6a44d8_279dddfbd5024e23af764c14aed79253.pdf?index=trueIn 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_off000163f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163F7 5516 bytes
SHA-256: a5b0f859c902839a1f37bda136a7681656ad616464ed7599fe7e6dd5595e2e86
font_01_sfnt_off000176a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176A7 12036 bytes
SHA-256: 0372687516d00375278a1010cc0c49d0e2e77957e1a614989b1e93b7ab3329ee

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