Malicious PDF — malware analysis report

Static analysis result for SHA-256 f78fc5cadb1e8682…

MALICIOUS

PDF

100.9 KB Created: 2021-03-16 00:48:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6c0bfc5231e911a4e481c4a880b41fc4 SHA-1: 24842eb991408746230518f1d1fced652715a371 SHA-256: f78fc5cadb1e8682d28269209256b7f3a06ae5980701f10bfe8ec0557691dbca
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains metadata related to PDF generation and a keyword search term, reinforcing the lure for users seeking specific information.

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
  • 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.
  • 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://bologen.ru/award?keyword=amiga+date+cuenta+libro+pdf+gratis PDF link annotation
    • https://cdn.sqhk.co/tatomaxeriri/VXXihge/99011973237.pdfIn PDF document text
    • http://gikodarekegov.mywebcommunity.org/fulusetemasisa.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/ggvVjc0/zovutukarepobuxofowa.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanekoxo/iiguYgg/hp_switch_find_ip_address_port.pdfIn PDF document text
    • https://bativizamazon.weebly.com/uploads/1/3/4/7/134770744/b2f827cc398.pdfIn PDF document text
    • https://tagakokiginozol.weebly.com/uploads/1/3/0/7/130775172/rodadufiwijipoj.pdfIn PDF document text
    • http://lusolakidareve.mywebcommunity.org/turbo_mailer_license_key.pdfIn PDF document text
    • http://xalowazejadiv.getenjoyment.net/65316320298.pdfIn PDF document text
    • https://susominen.weebly.com/uploads/1/3/4/7/134714937/5156592.pdfIn PDF document text
    • https://gebijodefilamoz.weebly.com/uploads/1/3/1/4/131406109/fivuru-dogakinus-labogukizo-befasumef.pdfIn PDF document text
    • https://damitonamusu.weebly.com/uploads/1/3/4/3/134306925/pumumopemoxiwez-lipezi.pdfIn PDF document text
    • https://cdn.sqhk.co/zokuzadisup/ibgijed/disney_emoji_blitz_outer_space_emoji.pdfIn PDF document text
    • http://zemesod.getenjoyment.net/nomenclature_of_bicyclic_and_spiro_compounds.pdfIn PDF document text
    • https://cdn.sqhk.co/fagiseregu/0imcjbJ/opera_news_trending_news_and_videos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://29aa9d28-cc9d-45fc-8d86-3718b5881c84.filesusr.com/ugd/74c34a_89be3a8332614e588802d3411f784c62.pdf?index=trueIn PDF document text
    • https://2cc3dcad-61c1-4442-8662-ca5be7cd8672.filesusr.com/ugd/71b93f_5d8de82629cf4f8eb94a0ede494337c1.pdf?index=trueIn PDF document text
    • https://e209d09f-5af8-48a0-acfc-72d03e9bea0d.filesusr.com/ugd/946fcc_5aeff959f6a34fa6aa0d4afb1f366238.pdf?index=trueIn PDF document text
    • https://97783159-ced7-426e-9fbd-60d2bb3342fb.filesusr.com/ugd/00058f_284588e61b384bc2bebbec7f6dc54892.pdf?index=trueIn PDF document text
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_f9059f940dae4410b3af660dbf1b7773.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000139e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139E2 5488 bytes
SHA-256: 28fdf89c587f12bd25cad06f2f5db469b90ada06a00a845e5de060148d70f594
font_01_sfnt_off00014c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C60 13176 bytes
SHA-256: a621bdcbab43aa905c17b4af1b637b30ed0cf52e0c03233f6bb5f0c9a88b1933
font_02_sfnt_off000176f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176F6 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333