Malicious PDF — malware analysis report

Static analysis result for SHA-256 273dda34211649db…

MALICIOUS

PDF

71.9 KB Created: 2021-01-31 12:45:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 484b2f3d2ca0a4adbc09e25da33bd91a SHA-1: ac2ebfdc9d582136c0fa86c7d42244ef71a793e8 SHA-256: 273dda34211649db6b8a27a087fc7fe7e831e3411822c7a8925dfd5b18da95eb
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/aws?utm_term=making+bar+graph+worksheets+pdf PDF link annotation
    • http://aydym.club/kujidigiroruvabofeci9tg.pdfIn PDF document text
    • https://cdn.sqhk.co/lilapanorup/MtgIjhg/free_video_to_gif_converter_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/leperanurosi/hiYlhiD/tepokorudopavesamirudak.pdfIn PDF document text
    • http://guwelureg.22web.org/pufadaxejiwebokiwoz.pdfIn PDF document text
    • http://item-mask.top/nanagajimebubemowep4t3m.pdfIn PDF document text
    • http://tex-comm.ru/91887468382wvj0e.pdfIn PDF document text
    • http://mosquito.codes/libro_de_kamasutracbb6b.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/zobuwubedak/lipid_test_report.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/nakanededulokozipele.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/aashiqui_1990_movie_filmywap.pdfIn PDF document text
    • http://lagadasisipas.rf.gd/jabotamatexudikajuti.pdfIn PDF document text
    • http://juvuzonowokogu.rf.gd/38153910754.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/molubexotin.pdfIn PDF document text
    • http://degefoxovovi.epizy.com/movekakas.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/jivatibatubuvopuxedu.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_off0000dc90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC90 5572 bytes
SHA-256: 8e029e866c485fb4712306b9f6d09a44b346455c23e43fd55d83e1f0c5324f22
font_01_sfnt_off0000ef98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF98 10284 bytes
SHA-256: 1b7768060287a1b41583420b30ca8273cf3f67624d24bdb5ad250cfca55bda3c