Malicious PDF — malware analysis report

Static analysis result for SHA-256 b98c929b646e5bec…

MALICIOUS

PDF

79.4 KB Created: 2021-02-05 21:32:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 91e114102522a59cd02fd30529d8389a SHA-1: 69390137e32947bbc341beefc531fb68b7ba3e02 SHA-256: b98c929b646e5beca95847d1414ff8b45ac5646a962dcabdc417192c42ce562f
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating phishing and trojan characteristics. The embedded URL, 'https://baarspo.ru/aws?utm_term=avi+to+mp4+converter+free++filehippo', suggests a lure related to file conversion, a common social engineering tactic. While no scripts were explicitly extracted, the PDF format and the nature of the detection suggest potential for embedded malicious JavaScript or exploits.

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/aws?utm_term=avi+to+mp4+converter+free++filehippo PDF link annotation
    • http://silvanozito.online/ganga_action_plan_class_10_cbse1fgyo.pdfIn PDF document text
    • https://cdn.sqhk.co/wujugojuse/bdoMTrx/91465932684.pdfIn PDF document text
    • https://cdn.sqhk.co/revikokelobu/Wjachhf/99582360654.pdfIn PDF document text
    • http://prolac.ru/free_bitcoin_generator_free_btc_20199r1l7.pdfIn PDF document text
    • http://goxuvux.22web.org/factoring_worksheet_doc.pdfIn PDF document text
    • http://itash.space/30694712783nyws6.pdfIn PDF document text
    • 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
    • http://jipokogave.epizy.com/tilebifagixowuzov.pdfIn PDF document text
    • http://mewozegi.epizy.com/dejuviv.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/cost_budget_estimate_template.pdfIn PDF document text
    • http://vizulubafaxal.epizy.com/velipazizi.pdfIn PDF document text
    • http://parolodase.epizy.com/mexobiwulamaxapelemar.pdfIn PDF document text
    • http://xetoluwe.epizy.com/jagufaxof.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/common_nursing_interview_questions_and_answers_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/oceans_by_hillsong_israel_tour.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/create_a_dashboard_in_excel_template.pdfIn PDF document text
    • http://lerezivopo.rf.gd/44395783913.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/indesit_washing_machine_symbols_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/brother_mfc-_l2700dw_treiber.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_off0000ec7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7C 4792 bytes
SHA-256: e004ef66f59f98e5840da91e38898128698521334a9f3eaae2d81ab22fa51c5a
font_01_sfnt_off0000fc9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9A 10912 bytes
SHA-256: eb4de12c725b6ed4045f95df852d51b5097baf986383d88a9e8abb0d14dccf69
font_02_sfnt_off000121c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C5 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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