Malicious PDF — malware analysis report

Static analysis result for SHA-256 698570d8a1961863…

MALICIOUS

PDF

78.4 KB Created: 2021-03-16 23:11:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 61174027a7c77ee7c4cc41bba9861164 SHA-1: 9354046ef75df55dd408a275186f6773e32d2cea SHA-256: 698570d8a196186346114f0c63d315654149ec9303523465bc50fcd433c207d1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://midufefew.ru/wix?keyword=a+memory+of+light+pdf+online PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4529697/normal_5ff078c34274d.pdfIn PDF document text
    • https://piwomokoxik.weebly.com/uploads/1/3/5/3/135335333/butisewutar.pdfIn PDF document text
    • https://cdn.sqhk.co/migazajigum/jg1VgiT/voguwak.pdfIn PDF document text
    • https://cdn.sqhk.co/xasakeza/gVLNgfl/rudibumilimesuro.pdfIn PDF document text
    • https://cdn.sqhk.co/sitopizol/jecKXmV/tattoo_maker_game.pdfIn PDF document text
    • https://cdn.sqhk.co/vivakawibaki/hdYRkig/secret_codes_hacks_ip_tools_pro_apk.pdfIn PDF document text
    • https://rewumakabaw.weebly.com/uploads/1/3/4/8/134856880/5159593.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417327/normal_601bbacc85332.pdfIn PDF document text
    • https://fujinimozebuxe.weebly.com/uploads/1/3/0/7/130738673/3442503.pdfIn PDF document text
    • https://cdn.sqhk.co/tumakakebi/aidjdEo/tujibedigimadijubejot.pdfIn PDF document text
    • https://wolunogejafijut.weebly.com/uploads/1/3/4/6/134649672/lixupuwidikuv.pdfIn PDF document text
    • https://dedopaka.weebly.com/uploads/1/3/4/4/134498192/goralalujavutaxuza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449399/normal_600d7bb2b5703.pdfIn PDF document text
    • https://kegadurab.weebly.com/uploads/1/3/4/0/134096735/86916.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376612/normal_5fc5a0f3b5924.pdfIn PDF document text
    • https://xoludifatak.weebly.com/uploads/1/3/4/4/134477652/ac3a34b6c241.pdfIn PDF document text
    • https://nunibuzobaga.weebly.com/uploads/1/3/0/7/130740367/lademitegij_vinenofir_wulegojomere_bitegixagija.pdfIn PDF document text
    • https://ruwivogisi.weebly.com/uploads/1/3/4/2/134265822/49b6d4213f085c9.pdfIn PDF document text
    • https://jinijazi.weebly.com/uploads/1/3/4/6/134668286/kuzupevupepi-tabigekuni-totozonavofujak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/be5eb349-3e2e-4a7a-8360-d8796fa6edd2/what_is_the_cost_management_system_in_business.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73185757-7259-4e90-a0b0-2b765ae1e067/voxotejoxivawenureb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dc6223d-8557-46de-867e-3099f61d2bf0/how_to_eat_keto_at_el_pollo_loco.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_off0000f89f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89F 5156 bytes
SHA-256: 0ee546aa44f633e45cfe899bd7ff0c16756bec2c03cc8644996ed4a1013a705a
font_01_sfnt_off00010a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0F 10016 bytes
SHA-256: ffac06cf3b9e8de77881e5b40291d1ae07cd39b3e7e6e35e894ffdef8a3257de