Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af57e18c8e096c9…

MALICIOUS

PDF

78.1 KB Created: 2021-03-01 15:13:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2a9b9e70098b4ee56c90d59b45e79190 SHA-1: 8fb6105b078fe84f3630c50648d8346cb0e86f05 SHA-256: 1af57e18c8e096c9463ac5966ae450450a88ac2b7b400370951dc436c06c99ee
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a URL that appears to be a lure for software cracks or serial numbers, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the presence of external URIs and the overall detection verdict strongly suggest a malicious document designed to trick users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/award?keyword=adobe+acrobat+7.0+standard+serial+number PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4491168/normal_600f3e0f9ef39.pdfIn PDF document text
    • https://cdn.sqhk.co/vatuliwa/ojejihi/idealo_online_shopping_product_price_comparison_website.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvexudid/7TgdgdV/dolozamuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489609/normal_5fd7a85bba93e.pdfIn PDF document text
    • https://cdn.sqhk.co/jedelamodafa/gD2FjhU/69291477123.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/qDieZ2A/fulunu.pdfIn PDF document text
    • https://cdn.sqhk.co/noloxunipe/jcgj8ia/fataxuvedediwinolefuri.pdfIn PDF document text
    • https://cdn.sqhk.co/kolusugego/cBhgUjf/sms_keyboard_samsung.pdfIn PDF document text
    • https://cdn.sqhk.co/woleparos/jjieJhe/54563179629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411250/normal_5fd39b3c29e4f.pdfIn PDF document text
    • http://waferaboteb.mypressonline.com/79966933563.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/WibjBR2/zombie_killer._223_ammo.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/reasons_why_a_dryer_will_not_heat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455914/normal_603765b103262.pdfIn PDF document text
    • https://cdn.sqhk.co/lilomovetum/dSiihhj/55758221648.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/6hbidie/wood_carving_projects_for_beginners_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409248/normal_5fdbdb8e2b6af.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/kovezux/disaster_recovery_template_by_kroll_ontrack.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/what_is_the_master_cleanse_lemonade_diet.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/2461757009.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/4022054165.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/tagajukogadudedoxera.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_off0000f536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF536 5468 bytes
SHA-256: 3301f1c656e7da144a8d645a171e483e41305bcc3ffdc2bd31d32c3497ee0d41
font_01_sfnt_off000107c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C3 10264 bytes
SHA-256: d1dbe6681878bfb45550066380be0ed6e76b4418f6c3300bde8ef8f62c520472

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