Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4c22909c551101d…

MALICIOUS

PDF

78.5 KB Created: 2020-12-18 20:54:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 63a6e2ca9c45330a971d1f2cf495b64b SHA-1: d122d46c1c4ea36c91d884acc07136aa62b007b0 SHA-256: a4c22909c551101d8cdb67cbb610f3b99891c6abb9029c5d1939436ce4920b77
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, appears to be related to a 'citizen calibre 8700 battery replacement', suggesting a phishing lure. The presence of an external URI and the ML classifier's high confidence indicate a malicious intent to redirect the user to a harmful site.

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://trafffe.ru/strik?utm_term=citizen+calibre+8700+battery+replacement PDF link annotation
    • 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://uploads.strikinglycdn.com/files/801a13ce-367d-4344-93e3-e40e8364bf4f/meridifa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b3d5837-0b65-406f-881b-13842dd97a68/the_night_i_followed_the_dog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a34824e-e27e-485d-80de-878244aee474/best_wallpaper_scoring_tool.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdcba3646033b444b395ad1/t/5fdcddaaa61ece75b4cd5ab8/1608310186311/getemozirotanonasef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16d2ed59-a6af-46c4-bcff-0efc30e0eaa3/94996810884.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3669c7d0c8f249d50c5e7/t/5fc68f89cb3e0f577135743f/1606848395696/fantasy_name_generator_skyrim_dragon.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfe4a2dd96f5918b4887a/1606286923693/wup_installer_wii_u_juegos.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1015360f2895dc1e86a3c/t/5fcdf869eb18547f4ba8a369/1607333994282/87465839560.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c73cdf132613bbd6778b/t/5fd66d6a034a586a4f457d1f/1607888234878/acrobat_dc_standard_2015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c59322ac-510a-4a36-98b9-e4c456d23c8f/bewikafewopusivunedadejor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ad176a3-53a0-4e82-b650-84e6f22bf058/93152264565.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf59813c02f22b9d047da0/1606375810862/notice_to_quit_form_colorado.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7af4058762305c0fa1f2b/t/5fccccf0a87f9f1b19d70fbd/1607257350902/xudonazudoroxurupevawuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/027441bf-9a4b-47d7-8be2-5b60b373d671/68716542795.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc0fdb9b-9c72-4498-b3c8-0a0de601f69e/saxon_math_answer_form.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_off0000e717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE717 5308 bytes
SHA-256: cf7d744ee6ce88f902ca9e629ad94ac75cf66110502ff6987a5288ae24ac4766
font_01_sfnt_off0000f916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF916 11048 bytes
SHA-256: 14ea10925884bbd778d418aff7834ae97baa17a8379cd23dffef3b0e5a986a9f
font_02_sfnt_off00011f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F03 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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