Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3b8e08f8a3268f5…

MALICIOUS

PDF

86.9 KB Created: 2021-03-03 02:27:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 2f75073b59ce3e0a876ebbe838bd8e9a SHA-1: 9f22d2bb9e4bc992723f2735be302c2c4bdf376e SHA-256: a3b8e08f8a3268f5b3a6b9d0244eda989ccd0b44f17ac14dac1d0385dc7b0c3e
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate this PDF is malicious. The embedded URI points to a suspicious domain, likely used for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://druttle.ru/123?utm_term=the+negotiable+instruments+act+1881+section+4+covers PDF link annotation
    • https://cdn.sqhk.co/jivazufevi/gcgj9ic/60797551179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387807/normal_603bf428baaa0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427780/normal_603837257c66c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372080/normal_6039bbe72c4d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444636/normal_6035237397e72.pdfIn PDF document text
    • https://cdn.sqhk.co/bajowekununa/ifjjhgm/dekutikigizaji.pdfIn PDF document text
    • https://cdn.sqhk.co/zetikitor/SRoihM7/senemomezefajatutetenoj.pdfIn PDF document text
    • http://shimano-stradic.ru/m3u_live_tv_playlistorp4n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492257/normal_5fe2436c6651b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367013/normal_5fc61402d2843.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460946/normal_5fc7755951a80.pdfIn PDF document text
    • http://reduslim-shopofficial.site/86279276542g5yxz.pdfIn PDF document text
    • http://namsinc.info/namapekag1gpm4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466172/normal_6032be926a8cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470222/normal_5ff0f44edd844.pdfIn PDF document text
    • https://cdn.sqhk.co/puxezuxivas/hM8lmgg/starlink_stock_for_sale.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/fixararololu/guwukepulosonibavojana.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/regrouping_subtraction_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/50799835413.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/understanding_comics_chapter_1.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/15645399679.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/cost_accounting_sample_questions_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/rujifumafoti.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/16701818231.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA2 5696 bytes
SHA-256: ea589810b0ead50d7fa24124e63516d9e710637fe4c7c31fc0c5d7d6dd349b3e
font_01_sfnt_off000110e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E3 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off00011c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C46 10184 bytes
SHA-256: 16514f7a84f8814084983df2c52c7e1ae62f39777ab4af7eb92a3e24989e8bf4
font_03_sfnt_off00013f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F82 3340 bytes
SHA-256: 6f4ab4c347caa7f0058ffeaf5d05640bc7c048b1f585bf071d2e276a6fa373f4

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