Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8b364b11842dd09…

MALICIOUS

PDF

72.2 KB Created: 2021-03-24 00:20:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 270c62565eb1c734a8d0c101e4e1357e SHA-1: d26e42854e152eb9f51244465f11689a97229e39 SHA-256: c8b364b11842dd092f2baf933025b955850d1ccb01e3c7a02e304f2381727da5
104 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV signature and an ML classifier, indicating it is a Pdf.Phishing.Trojan. The presence of an external URI pointing to 'baarspo.ru' and a heuristic indicating an urgency lure suggests the document is designed to trick the user into visiting a malicious website. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=c+form+format+for+hotel
    • http://kupivse.xyz/3535182326897mb0.pdf
    • https://cdn.sqhk.co/rewazexi/cjcgiij/sliters_ace_hardware_lakeside_mt.pdf
    • http://salonly.xyz/photo_banner_app_free6gdht.pdf
    • http://fewizoge.22web.org/aspectos_politicos_del_mexico_independiente.pdf
    • https://cdn.sqhk.co/sikudile/gjmcHdB/systems_engineering_v_model_ppt.pdf
    • http://fejavodexata.getenjoyment.net/23687096676.pdf
    • https://cdn.sqhk.co/zegofurop/iajjgis/lodujasa.pdf
    • http://storeplus.pro/89458703970ctbqi.pdf
    • https://cdn.sqhk.co/pixafosabow/Ghcgghf/swatch_swiss_store_near_me.pdf
    • https://cdn.sqhk.co/tofepojafuz/f6Q4ifI/iras_gst_guide_for_property_owner.pdf
    • http://totipuzuforaz.mywebcommunity.org/nematode_definition.pdf
    • http://iglivesupportteam.com/all_trigonometric_formulas_for_class_1201bwm.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f904ef53-caa1-4f0f-8a97-c50675c03ece.filesusr.com/ugd/2f8cea_fbabc411fdc2431fb4c6051c22870887.pdf?index=true
    • https://s3.amazonaws.com/setigafat/33559407683.pdf
    • https://7d6e376e-1ee3-4df5-88c1-8d1511d419f8.filesusr.com/ugd/7dd30d_213de650cac54a01bcceb4850805ec79.pdf?index=true
    • http://tizeruxabono.onlinewebshop.net/how_to_password_protect_a_using_acrobat_reader_dc.pdf
    • https://s3.amazonaws.com/legobegutulo/60978350258.pdf
    • http://pexoroxijaseduj.rf.gd/13604748334.pdf
    • http://dowifut.epizy.com/55925191808.pdf
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_a4378b696c4944938a1f4b42ba20b38b.pdf?index=true
    • http://jabaxuzadowepep.rf.gd/taged.pdf
    • https://f579be4a-c2ec-451d-94ee-532237c06880.filesusr.com/ugd/9f6a24_7db1eaf5bdac454a9ce4571aefb44f47.pdf?index=true
    • https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_d2f8d8874ae946ffb94fcfa403cf1082.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df79.bin
441a6bad4b7db168dd19d102b5f62fcc47ca035ea1033b7dd2a18d4f5eedfbc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF79 4732 bytes
font_01_sfnt_off0000ef5b.bin
a16dcee6f1d7e292653747d05197cae2644221be48d85c89c1561b48f6e2f1be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5B 10640 bytes

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