Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cb9bca80155b65a…

MALICIOUS

PDF

77.2 KB Created: 2021-03-15 08:19:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f82160fef5e1a5cf6044f53661151b30 SHA-1: 955f4e16b1b9d4852a0ce3a00484629b8383832a SHA-256: 7cb9bca80155b65ac437238554708bfb8d24f1c06e36e169182be44dd80f5959
112 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document flagged by ClamAV as a phishing trojan. Heuristics indicate the presence of urgency and download button lures, suggesting a social engineering attempt. An external URI pointing to 'bologen.ru' was extracted, which is likely the malicious destination. No scripts were extracted, but the PDF structure itself likely facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/123?utm_term=la+cambiale+di+matrimonio+vocal+score+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4472188/normal_601597ce489cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428039/normal_60271628ba914.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402507/normal_5fec795e677a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369916/normal_6031987287cf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444102/normal_603e1bf6ed1cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477386/normal_5fdfa6c0d6225.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488317/normal_60326100daba7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451929/normal_5fdd9c8de5309.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380525/normal_5ffe6fd3e1b26.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b16a864-244b-4a53-b6d9-b0962039fab8/how_to_troubleshoot_a_gas_dryer.pdfIn PDF document text
    • http://zasaraba.epizy.com/modewowageguxodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da1391f0-9e58-45ea-8d7e-eca1ce7c2750/25810998364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ee414ae-7eb7-4238-8e13-5bedacf74a8e/pretty_woman_ukulele_tabs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b7cfdf1-8575-4a38-8c81-3ab462a60ba1/tulimanofadikulofif.pdfIn PDF document text
    • http://bosadubarelazu.rf.gd/nesedivozaneso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc662aa6-c7b1-4641-8940-5abcccebca94/samsung_steam_vrt_error_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98f43422-1297-4f22-98a4-393fadcf54dd/electrical_wire_color_code_chart.pdfIn PDF document text
    • http://dupetomumipur.rf.gd/51504526499.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/zamuregifelufilepopawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5b4ae46-39b2-4d79-a374-65ec0cb52a94/lebabeni.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/ledger_entry_questions_and_answers.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD796 5440 bytes
SHA-256: 1d13f9d3a947f04900bd583ba54c7fb4ab735664b62a3b255e9b351604480236
font_01_sfnt_off0000e9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FF 11300 bytes
SHA-256: a4030d971bcf7ba5c1827d03a59811dbaffecb4a3d61019259d0b27116f78cd9
font_02_sfnt_off00011027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11027 16184 bytes
SHA-256: f0d7227652c39c0ed3a674eb50801baccdef2bbf27cbfcf74ce440b78e632b52

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