Malicious PDF — malware analysis report

Static analysis result for SHA-256 33e16fb53a7653c4…

MALICIOUS

PDF

69.4 KB Created: 2021-02-12 00:25:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1fdaca203c0f2885a793a866a335ff48 SHA-1: d21224820f4a42dbefde60849027438426541550 SHA-256: 33e16fb53a7653c4ef3e399d7086a3aeaeeef5f52a2e63c10aa4af78cfb14ff3
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to 'baarspo.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick users into visiting malicious sites, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=geez+books+pdf+free+download PDF link annotation
    • http://goshop32.site/353646307895f3c7.pdfIn PDF document text
    • https://cdn.sqhk.co/rekewuneboxu/giCf7ih/webtoon_promo_codes_by_freeshipcode._com.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwolupenilu/Rhgsja4/big_winds_facebook.pdfIn PDF document text
    • http://sosyaltakipcipanelin.com/51980235970kt7dq.pdfIn PDF document text
    • http://susurrus.space/hatchimals_colleggtibles_season_4_waterfall0qpi8.pdfIn PDF document text
    • http://itwomen.space/912960853009bs6f.pdfIn PDF document text
    • http://pojoxigi.iblogger.org/business_presentation_powerpoint_template.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sisaxu/zuruvowixugijavegomit.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/suvades.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/aaa_logo_3._10_free.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/ffxiv_crafting_power_leveling_guide.pdfIn PDF document text
    • http://gerinaselamezos.rf.gd/performance_parts_for_bmw_m3_e46.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/27256556047.pdfIn PDF document text
    • http://xogowakowokavuw.rf.gd/zuxoperotikivegot.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_off0000d3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B5 5412 bytes
SHA-256: 8c8011e672f9f699a9cb8abc9e8cf20b18077fec6f7d126f6bf658aa2f8b7066
font_01_sfnt_off0000e648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE648 10048 bytes
SHA-256: 2dbf7bd9de2a57fde52335598bb4f9628058b0f89e3b913c0274cfd30ed6f2e1

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