Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed067f9caf4eda45…

MALICIOUS

PDF

69.7 KB Created: 2021-03-16 09:16:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 03acec03298171a955cd6088923fc485 SHA-1: 99f357bf59f7f4fb63afcde150cf0510274e0478 SHA-256: ed067f9caf4eda452fed7fd489454526ec8b6dc60fca4379e43c75fbf6dbb91a
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. The heuristic 'SE_BROWSER_INSTALL_LURE' suggests the document's content is designed to trick users into installing malicious software by posing as a necessary browser update or plugin. The presence of numerous external URLs, many hosted on disposable domains, further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/award?keyword=free+download+experience+certificate+sample+pdf PDF link annotation
    • https://cdn.sqhk.co/pitekofotada/geqcghP/ww2_flight_simulator_games_free.pdfIn PDF document text
    • http://tevaruv.sportsontheweb.net/guvenuwuzi.pdfIn PDF document text
    • https://bedaruwi.weebly.com/uploads/1/3/5/3/135326402/6db829d.pdfIn PDF document text
    • http://linefofaxugedu.mywebcommunity.org/principles_of_business_management_download.pdfIn PDF document text
    • http://savineme.mywebcommunity.org/durejufarotatumo.pdfIn PDF document text
    • https://cdn.sqhk.co/zadoweferoxe/jjhqdgi/predator_fishing_charters_kiama.pdfIn PDF document text
    • https://dubujede.weebly.com/uploads/1/3/4/6/134607356/zitiporibavobijut.pdfIn PDF document text
    • http://xesapuwax.mywebcommunity.org/kerupivipuzonis.pdfIn PDF document text
    • https://cdn.sqhk.co/wefonasifaza/jLjhAjj/oregon_ducks_basketball_recruiting_2020.pdfIn PDF document text
    • http://vitonidero.medianewsonline.com/how_to_open_vizio_sound_bar_remote.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gusutawidike.epizy.com/mugosijazarevofisigakigul.pdfIn PDF document text
    • http://sanugifop.atwebpages.com/22544819885.pdfIn PDF document text
    • http://jodojan.epizy.com/fomodinofo.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_off0000d604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD604 5416 bytes
SHA-256: f1522b1a3840f24ee9b0ed6f70a66fcedd852508e3fdfae916d8cbb1397d04ca
font_01_sfnt_off0000e876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE876 9792 bytes
SHA-256: 2013e0a2082bea2b0116694142ece75a83d86c55a2ec27e0e0d7f2e0cae40224

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