Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8a85af22daf8c04…

MALICIOUS

PDF

82.3 KB Created: 2021-02-28 18:04:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 43407a37315efa6e5e63c16c5f5877f6 SHA-1: 1be7b0f1bbbf5d22c784c31bb954456c67e2c4b1 SHA-256: b8a85af22daf8c041d266f8fd33bbde5c5bc6cebf18fe545d7a4633fb6ed6aa4
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document body, though partially corrupted, contains text related to the 'rankine cycle' and appears to be a lure to direct the user to the external URL 'https://baarspo.ru/strik'. This URL is likely part of a phishing campaign.

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://baarspo.ru/strik?utm_term=advantage+of+rankine+cycle PDF link annotation
    • https://cdn.sqhk.co/jusigexovoz/Xm06heC/besezezajefiwitiwuvolof.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/jidjjgj/how_to_start_a_youtube_channel_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377935/normal_5fd906efa9b5a.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/fibomerutafasodafujigirid.pdfIn PDF document text
    • http://bovewitavivebu.getenjoyment.net/ruger_lcp_2_owb_kydex_holster.pdfIn PDF document text
    • https://cdn.sqhk.co/moturalogupe/QzDdEhj/29692792931.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://teworubinogo.epizy.com/b_sc_nursing_ka_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/53849098572.pdfIn PDF document text
    • http://fajazimigig.atwebpages.com/19306063821.pdfIn PDF document text
    • http://kunimaz.rf.gd/4176930099.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/25622546397.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/devexpress_report_toolbox.pdfIn PDF document text
    • http://jedulunub.epizy.com/parologejenozalesavewov.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/may_might_could_exercises_with_answers.pdfIn PDF document text
    • http://lituvatitibew.epizy.com/fall_template_powerpoint.pdfIn PDF document text
    • http://zisukuvi.atwebpages.com/64347143780.pdfIn PDF document text
    • http://fitatina.rf.gd/real_carrom_3d_multiplayer_mod_apk.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_off0000fff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF4 5228 bytes
SHA-256: 2ac2719a329f97cee6e7abe71768314b32a706b48ed5bc780ba5af38766a511d
font_01_sfnt_off000111e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E7 12476 bytes
SHA-256: e43c3d1063a942128523cd3d50a6e90aa9aa327697fb6b40e69b5bf047a0233a

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