Malicious PDF — malware analysis report

Static analysis result for SHA-256 b34a4f7bba36cdb8…

MALICIOUS

PDF

101.0 KB Created: 2021-02-22 22:13:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9d021d7fb359ba4b4f9a8f014cee8b87 SHA-1: 8b0b648ad7856fe095b971d50013115b74633e68 SHA-256: b34a4f7bba36cdb801fb2355ee9e0e73489c510e8b832e20b1ed004b8cfbd64a
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, specifically identified as a phishing trojan. It contains an embedded URI pointing to 'jottigo.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/123?utm_term=what+does+mourning+dove+mean PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462708/normal_5fd5f1ecac2d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470964/normal_5fce014b31833.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425772/normal_5fe1bb3a4771a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380211/normal_601bd3da6f7d5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mezotake.epizy.com/28114581041.pdfIn PDF document text
    • https://s3.amazonaws.com/sejakopa/asthma_action_plan_template_nsw.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/36091651791.pdfIn PDF document text
    • http://nodixuzotegiv.rf.gd/cover_letter_block_format_spacing.pdfIn PDF document text
    • http://ramexizopu.rf.gd/temexuvedis.pdfIn PDF document text
    • http://dunoziboxisi.epizy.com/things_im_thankful_for_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/butema.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/wudadexo.pdfIn PDF document text
    • http://jinufezep.epizy.com/18826476408.pdfIn PDF document text
    • http://puteruwegadijem.epizy.com/muvupetixilaxal.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13026 5280 bytes
SHA-256: 2ae662f50320c7b2168e5ac91ae668a72160ef9687eaf81ffccb82822c606e28
font_01_sfnt_off000141f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141F7 1716 bytes
SHA-256: b744d20329a21ba1921c870a4deaacb4064f710d75eb1a58e31c0067c31195cd
font_02_sfnt_off00014a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A9D 11532 bytes
SHA-256: 0fc91d2e88c60204d8b281fc979c5fcf18d86024c05644bc09d538d81407a7de
font_03_sfnt_off00017184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17184 16076 bytes
SHA-256: 97990adcc91a1e334b404002f9a6b356dd0e0e66c9193a0499481f503a30e292

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