Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbda1c7a0fce5a4c…

MALICIOUS

PDF

76.4 KB Created: 2021-05-23 19:09:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ea162db6b894ca8fb0e45de492af6f25 SHA-1: 459a561343a011bca00e4d627f2790f76e1e8324 SHA-256: dbda1c7a0fce5a4ca96459bf241bc250ec6386f33452f7d91fbfdedd4fcb85cd
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a URL that appears to be a phishing lure for downloading a game, as indicated by the document body text and the 'PDF_URI' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to deliver a secondary payload. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://xezojetit.ru/strik?utm_term=counter+strike+source+apk+%252B+data+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369504/normal_60258984dfc2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414169/normal_6002f02d15dd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376358/normal_604ccdabd8fc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419002/normal_60268d2f598b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460963/normal_5fdab61f41457.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/tobojelusiwi/gipopeva.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/axis_of_symmetry_factored_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/nidimerusori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c190699-10d4-4827-9391-a858df16d253/jujokemajanegufone.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/fipigil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3f5865a-256f-487c-82fc-7bf8b2615a43/82158039026.pdfIn PDF document text
    • https://s3.amazonaws.com/zafibimutadoti/what_are_the_physical_requirements_for_indian_navy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e968a545-27b7-4df6-94ff-f2995e4737c9/florida_association_of_realtors_rental_application.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12cdfe83-1ea1-4eb6-9a18-03a0004150a4/terujesofususunakosawix.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/when_you_know_its_time_to_walk_away_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/what_does_the_cdl_permit_test_consist_of.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/113c8d87-1af5-4dba-b619-1afe50053302/42615758598.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/68756592458.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/79018544011.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/oxford_business_english_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/pavezilezeko.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/cardi_b_bruno_mars_grammy_performance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d9cd159-9c0c-4758-bbb0-43e6072df28d/dell_latitude_e6410_wifi_drivers_for_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fc3317b-0e6f-4dc3-913c-4bc29dc57545/bogupumizifekoxonuxopifan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d72d646-d86f-4064-939c-cfe037ef131d/how_to_calculate_cash_dividends_per_share.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_off0000ed69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED69 5128 bytes
SHA-256: 15cc8d2b032192d4ed9e27445ba34724f1134cdeee05b07161851bddd10fd44f
font_01_sfnt_off0000feff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFF 10752 bytes
SHA-256: f340de26b9eb8a376c0d3eec0bf3dca0fc3db4faebb765f0b3d577497fa919bb

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