Malicious PDF — malware analysis report

Static analysis result for SHA-256 81163c233e21378f…

MALICIOUS

PDF

77.7 KB Created: 2021-03-17 17:59:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 55eac3f949b9c469b80feec9d4802961 SHA-1: 822d2e3405cc52b1b2167388d94b56bddd5e574d SHA-256: 81163c233e21378fc0b40923dd2892a288bb4ee716c6848342304939254e718a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by both a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL suggests a phishing or malware distribution lure, disguised as a coloring page. The document's structure and the presence of external URIs point towards an attempt to exploit vulnerabilities or trick the user into downloading further malicious content.

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://kuzutuzo.ru/award?keyword=sea+animals+coloring+pages+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393485/normal_5fe23e5e5886a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459776/normal_5fcc0321439c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449000/normal_60358124a8a50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527345/normal_601289315361f.pdfIn PDF document text
    • http://jofufunobek.sportsontheweb.net/880069099.pdfIn PDF document text
    • http://dorulezebum.sportsontheweb.net/how_did_the_maze_runner_1_end.pdfIn PDF document text
    • http://jedomagisuw.getenjoyment.net/best_health_and_safety_courses_uk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://revodez.myartsonline.com/sozotafugaxulazutobije.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/kuzodavamafuderipiwamumu.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/63650853306.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/bluetooth_windows_7_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/2015_lexus_is_350_f_sport_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/avery_binder_dividers_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/google_illustration_style_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02a443c8-ee30-4198-8f12-c67898198e82/hp_deskjet_3050_driver_download_windows_10.pdfIn PDF document text
    • http://kemesuxaw.myartsonline.com/23642902398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb99c457-b955-4fa6-9535-a9e3f6711ecf/43291169059.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/conversion_of_square_units_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/soapy_rides_car_wash_business_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6325055d-935a-473e-877f-2b2d55dd09d3/kudoridamijuxuxexamupufa.pdfIn PDF document text
    • http://raxajabidadida.onlinewebshop.net/how_to_get_coupons_for_gamestop.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_off0000f06c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06C 5580 bytes
SHA-256: 017aa03fc0326ba856b7f1a1d35b9ba92d9b52110bf1097e080fb35d66c1a179
font_01_sfnt_off0001034f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034F 11368 bytes
SHA-256: ff5f68d8c80e68ccc657f8ff53a017c1e441c1bc9b9ce8fc3527811504573a8e

Open this report in the interactive analyzer, or submit your own file for analysis.