Malicious PDF — malware analysis report

Static analysis result for SHA-256 9905f08fc5908861…

MALICIOUS

PDF

72.9 KB Created: 2021-04-08 09:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 56af5f8ce9a88858ebc2cdbe80b4c09d SHA-1: 3c47e914f008656fc585a2ff5fd5a06821b58ce6 SHA-256: 9905f08fc5908861f408f6b8a3d73311488d8e983e5af84586fd4ecc954c5910
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/strik?utm_term=data+structures+in+python+github PDF link annotation
    • https://cdn.sqhk.co/botonerepap/ajdjgjg/37675236948.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382770/normal_6058feed7a86f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481675/normal_6006aa52f1484.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/hzjfQ5b/tree_dollar_locations.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475208/normal_5fc9cbe02366b.pdfIn PDF document text
    • https://cdn.sqhk.co/govazofaj/hgwiax9/love_languages_short_online_test.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/cgjthgC/79967034562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388420/normal_60245dbe7a40f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377414/normal_5feb1606c3d60.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/87f16b48-824e-4d6b-9f62-bc6ed87dc462/wepaladawewuvedofos.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/jovodewubesogexijiroraf.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/pudigufo.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/wotaminakep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5431a1e0-469a-4942-991a-c7991e9f901e/21155531112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/502f4068-005b-4960-ba3e-45bf2c9b6e5f/scott_pilgrim_comic_color_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4612e27a-64df-4a1c-8727-149e5949361f/28450040624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c84271d-1622-42cc-9b96-29ec83ce4d9f/98701580225.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_off0000dda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA9 5404 bytes
SHA-256: 54e9b0981b6b1108951f3da431b0ea07179de4dfed518d94665a5cd91b0befc4
font_01_sfnt_off0000f014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF014 10788 bytes
SHA-256: d4bc3e8f00a69db707823b253afa63f1f159a667a1ccb9eac02793c723ef74bf

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