Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa3cfa91da336ef9…

MALICIOUS

PDF

68.5 KB Created: 2021-02-04 09:43:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 3903d17ffb3779a5ba2ae7a19a52576a SHA-1: ecec594d00d1baab86539a1184e064360fbeb103 SHA-256: aa3cfa91da336ef9f13e36ac616c99a9744fec9c5db0206f8adba1359da63a8c
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wb?keyword=ccleaner%20app%20android PDF link annotation
    • https://ruwatija.weebly.com/uploads/1/3/4/8/134846771/nutafiful-wawexabi-rovajefe-kovitupi.pdfIn PDF document text
    • https://rixagaxovexi.weebly.com/uploads/1/3/4/0/134000332/6216782.pdfIn PDF document text
    • https://pimupaxepa.weebly.com/uploads/1/3/1/8/131857198/tanigabibavuwajit.pdfIn PDF document text
    • https://donelodef.weebly.com/uploads/1/3/5/4/135401433/zofuvinowi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387218/normal_600205af6bc0a.pdfIn PDF document text
    • http://jobauthor.online/povijumeguxevesunejesa216.pdfIn PDF document text
    • https://cdn.sqhk.co/wanevakaxuma/gcijcEN/rulujegimuvaxuwazazunesi.pdfIn PDF document text
    • http://ch-data-2a8fv9s.pw/duwaguboxp9dj8.pdfIn PDF document text
    • https://cdn.sqhk.co/jivaduzar/T4Kgfhh/tejuribores.pdfIn PDF document text
    • https://wefupavoxed.weebly.com/uploads/1/3/2/6/132682659/4588635.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/a73YpGR/family_pet_dog_home_adventure_game.pdfIn PDF document text
    • https://debagodijif.weebly.com/uploads/1/3/0/9/130969595/fb301df616552ec.pdfIn PDF document text
    • https://tojuxumisadef.weebly.com/uploads/1/3/4/7/134714483/2988395.pdfIn PDF document text
    • https://debuvubuni.weebly.com/uploads/1/3/4/8/134846467/ece283a044b8b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://debukigezi.epizy.com/fsx_flight_simulator_x_apk.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_off0000d02b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD02B 4792 bytes
SHA-256: 952cfcb439386f07b8779ace26a5284ae5bc9c9592e823dd85464a68d9ffba36
font_01_sfnt_off0000e081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE081 11280 bytes
SHA-256: a150c375e935b53f4e1b5345dc746712b4fc3318619fe483c1c3c590ecf113ed