Malicious PDF — malware analysis report

Static analysis result for SHA-256 b764baccd80f4e39…

MALICIOUS

PDF

86.3 KB Created: 2021-05-09 10:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e09c31634b543d689710eb492e8f1136 SHA-1: 9b609191a1f7cf54f1c3340bb31a7d8d8dee4da3 SHA-256: b764baccd80f4e39d633b0892cd891eb920fddfd94ee7993f952c9170714077d
104 Risk Score

Malware Insights

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

The PDF file was detected as malicious by a ML classifier and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that mimics a search result for a movie download, likely intended to trick the user into clicking and downloading a secondary payload. The presence of a 'download button' heuristic further supports this phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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://resalured.ru/strik?utm_term=sherlock+holmes+1+full+movie+download+in+hindi+300mb PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426953/normal_6005b6a019dc2.pdfIn PDF document text
    • http://pozuvixa.getenjoyment.net/what_was_the_median_total_family_income_in_canada_in_2014.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392864/normal_5ffa0ed8bc51f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387939/normal_5ff950b96bae8.pdfIn PDF document text
    • https://cdn.sqhk.co/migefareg/jdKdN4P/castle_siege_wikipedia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502246/normal_6046a4598dc40.pdfIn PDF document text
    • http://tonemisi.medianewsonline.com/53467243329.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409417/normal_6012c63956b36.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawaferew/rbE5Fhg/photo_movie_maker_app_free_download.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/votubukaxogilix/how_to_adjust_draw_weight_on_a_bear_compound_bow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94d9de69-fa46-4f77-9504-589294b5fb3a/renafagudofowomu.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/best_online_drug_guide_for_nurses.pdfIn PDF document text
    • https://8ed7ad90-0d0e-491f-9c15-1f6cd5a61d18.filesusr.com/ugd/f1a804_503c667c301a4bababab630f008d68c0.pdf?index=trueIn PDF document text
    • https://9db8f275-5044-409a-aa1b-3306d9dda9bd.filesusr.com/ugd/361f4b_9f36d5505d0c496bb1c8b0f9a76ae5db.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c55131e-22a3-40a1-9668-a569f7dbfd7c/65915592095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2bf2ba4-742c-4a1f-858c-244479400ef5/black_and_decker_drill_bit_set_bq.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/glow_worm_boiler_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/85042530271.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/adelaide_tv_guide_tonight.pdfIn PDF document text
    • https://38f9ccf9-db33-4582-994d-0ea518e52d38.filesusr.com/ugd/368de4_884c7d58998a4d5bb8f94a48fd7acf2e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/095364e0-3c06-40c3-ba2b-8f5093e7be34/7896382988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ccf1f85-d729-428f-a726-6042f3cbaccf/54695201937.pdfIn PDF document text
    • https://f200304d-316b-45a9-b05c-680123ec6d1a.filesusr.com/ugd/aad1a2_ae636e00dae44f72bc4d32cf25d636fe.pdf?index=trueIn 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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD1 6080 bytes
SHA-256: 847faf65452218726802a004dd8f967a3edb9826fa7fba245d3ce94bc6d344b3
font_01_sfnt_off0000f468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF468 7512 bytes
SHA-256: 7eba68a3ff6e1153deb3248c98608be6e8a130639e140ecb354e01b117068d3f
font_02_sfnt_off00010c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9D 11120 bytes
SHA-256: 645eae315c3f09567a4d96933c90835fce30c2b40149407e7a6552390d1b2a8f
font_03_sfnt_off000132d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D4 16348 bytes
SHA-256: 38444e36f0b80c6870a1b29ea2c2e418a164a23a42420c86213a96e675588fd0