Malicious PDF — malware analysis report

Static analysis result for SHA-256 571ca2fa6bf0c2c3…

MALICIOUS

PDF

89.8 KB Created: 2020-12-18 01:28:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 550939654a90d3d20a0fc2b03f6b773d SHA-1: e0c38cc417e198576326e89b3bf6d3513e131c0c SHA-256: 571ca2fa6bf0c2c39d53e12ecdf53114aa2a963ca3f4b9452bb298f718ea9bfb
96 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 lure related to supply chain internships, directing the user to a suspicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of an external URI is a primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://traffking.ru/123?utm_term=supply+chain+internship+interview+questions PDF link annotation
    • https://xilevaxe.weebly.com/uploads/1/3/4/3/134391777/saseku.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/1540200.pdfIn PDF document text
    • https://jutebipofan.weebly.com/uploads/1/3/4/3/134334370/4ce5548.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/wenobagupexekap/jupakubepewug.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/murodoguvubefitulubixamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/210811de-0eb9-4b0a-97e0-2a23c37af09d/jowikemafuxilowipus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce55fe5895864d895667a2/t/5fd1626c87bef85997e02988/1607557741058/krita_animation_tutorial_deutsch.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf299173fb5383b674da2/1606283930520/resumen_del_articulo_16_de_la_constitucion_mexicana.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/pujisol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3caae1d6-e5e7-4eb4-a49e-a5634243c529/read_the_hunger_games_catching_fire_online.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/dometic_refrigerator_manual_rm2193.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e308bd6-30ac-4c33-9c71-a46372b1a100/fuel_pump_driver_module_2013_f150.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/733966bd-57b4-44d1-a200-db44e33338ae/bapojiwedajarefo.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED00 6588 bytes
SHA-256: 746cda19d0a45b0d6108c63ff8192b2f88c2fff5e5937e692a7cb04b31166607
font_01_sfnt_off0000fd7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7A 5504 bytes
SHA-256: ee6c834e818fb1398450ce819e88d70fda33bc024b31046d6f8df76bb3929979
font_02_sfnt_off00011041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11041 2924 bytes
SHA-256: 1b8130c7c2645fee2f6e435ed3847fc4ea875e4aedc1d0e99b8dae817e7c378d
font_03_sfnt_off00011c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C96 11108 bytes
SHA-256: c124045d6ed7d0d615d3d458166d02289883841c103c783fe89ce913d5415cd6
font_04_sfnt_off000142a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142A7 16416 bytes
SHA-256: 28e5bac4618028508f257ff34b87ce7ec1455798569232c0671c4b830f2e11de

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