Malicious PDF — malware analysis report

Static analysis result for SHA-256 65f0a648922ebb32…

MALICIOUS

PDF

80.4 KB Created: 2021-06-01 07:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 655bb6fb1a0d0ea4c6d0bad0960a3c28 SHA-1: c9e346f27eaca6f91139b246d2ebf2b724897f32 SHA-256: 65f0a648922ebb3271d0c4d3ef89e93d3396ef02d4d2591cfc9a61e7dd37b9e9
126 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to disposable hosting services and utilize UTM parameters, indicating a link farm designed for phishing or malware distribution. The primary malicious URL identified is 'https://oniceh.ru/pbw?utm_term=eset+smart+security+premium+apk+cracked', which is likely used to distribute cracked software or malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://oniceh.ru/pbw?utm_term=eset+smart+security+premium+apk+cracked PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370303/normal_605de3514c429.pdfIn PDF document text
    • https://batozovij.weebly.com/uploads/1/3/1/4/131455337/jutuvepalujopapikira.pdfIn PDF document text
    • https://tupezufowosen.weebly.com/uploads/1/3/7/5/137500557/7483941.pdfIn PDF document text
    • https://pifavakibapel.weebly.com/uploads/1/3/0/8/130814246/0e067f60cf84c0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428329/normal_60493a18ec2a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443810/normal_5fdaaca8e6725.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450247/normal_6068f8a447b3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384167/normal_6016c1660d03f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vatojorisa.pbworks.com/f/mesatowitetu.pdfIn PDF document text
    • http://foxobekizax.pbworks.com/w/file/fetch/144437895/toram_online_hack_2020.pdfIn PDF document text
    • http://nigezid.pbworks.com/f/does_metformin_cause_muscle_fatigue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01215347-042b-42fc-9079-5fd651f8f4f9/15391156479.pdfIn PDF document text
    • http://wozixokumo.pbworks.com/f/83172636599.pdfIn PDF document text
    • http://wejojixi.pbworks.com/f/devukavugejekatada.pdfIn PDF document text
    • http://mibegenav.pbworks.com/f/momuwupupirozurejakos.pdfIn PDF document text
    • http://fadoposapat.pbworks.com/w/file/fetch/144438324/uci_admission_decision_date_transfer.pdfIn PDF document text
    • http://sizolasipape.pbworks.com/w/file/fetch/144413757/mevetama.pdfIn PDF document text
    • http://gazumadu.pbworks.com/f/sokili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e670c7f-27c3-4e58-8968-4939547bd985/fuzuliwukasisaj.pdfIn PDF document text
    • http://japomajuxire.pbworks.com/f/nevumasivope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc8524fc-23b5-4047-bb82-97502aa959ee/verbos_regulares_en_ingles_con_pronunciacion.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/gta_iv_offline_mod_menu_xbox_360.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E5 5308 bytes
SHA-256: 1917381f4b541fc0f0aeaeaefa46f433c2116bc8825bbaed6022570a4099eebe
font_01_sfnt_off0000f6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EA 11304 bytes
SHA-256: 33b27b468a3be725c3b3b27f07c61e5cb55e56bb47ded6fc412b07c885918ee3
font_02_sfnt_off00011d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D97 16360 bytes
SHA-256: b9a2e868ca542bfea8bfdd0737a15d0be933cfd437204fe0dc875962e5965835