Malicious PDF — malware analysis report

Static analysis result for SHA-256 92984dd2af05f649…

MALICIOUS

PDF

79.1 KB Created: 2021-02-21 02:55:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6c1e9c22b1afca266f998ce4dfd8bc44 SHA-1: de3f210e48dec6e087ac2fca776e65acbbbe1c60 SHA-256: 92984dd2af05f6490e4146b208cf7a294151d5aaaa3413f5838d0ef4a33c72a4
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. One embedded URI points to a search query for 'east prairie mo nursing home', which is likely a lure to direct users to malicious or spam content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=east+prairie+mo+nursing+home PDF link annotation
    • https://molulodanewiv.weebly.com/uploads/1/3/1/6/131606256/1045916.pdfIn PDF document text
    • https://cdn.sqhk.co/gikunixa/iiiGnTe/guess_the_emoji_movie_game_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/vujixete/gicYiGV/tadejewijato.pdfIn PDF document text
    • https://datugabow.weebly.com/uploads/1/3/4/7/134745554/nokazaroku.pdfIn PDF document text
    • https://cdn.sqhk.co/vaziworab/ajbGwjb/gowirifurebo.pdfIn PDF document text
    • https://cdn.sqhk.co/kojivitew/igfog9P/food_giant_hueytown_sale_ad.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/MOSgfWz/youtube_html5_video_player_download_for_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/fenozidu/gijfEiU/97542711657.pdfIn PDF document text
    • https://cdn.sqhk.co/fanekizesedi/Mgigfjf/t-_mobile_says_emergency_calls_only.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/3ijhbVZ/dinosaur_fighting_games_free_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/xobitabab/hcuihhg/cissp_domains.pdfIn PDF document text
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/zewisukoniboneja.pdfIn PDF document text
    • https://jakilirimilibev.weebly.com/uploads/1/3/4/8/134862861/kenagim-tumadesuvuworo-ripejikur.pdfIn PDF document text
    • https://dezegumi.weebly.com/uploads/1/3/4/1/134108828/gujotesojisoviwofenu.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/fmifwIe/contacts_order_online_cheap.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/Njg2Lha/xixijuvofifuwov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vubixegigag.rf.gd/gikijidifowoje.pdfIn PDF document text
    • http://palalujopaxuv.epizy.com/free_blank_certificate_of_appreciation_templates.pdfIn PDF document text
    • http://nozuwodapa.epizy.com/fiberglass_sheet_rate_in_pakistan.pdfIn PDF document text
    • http://pufaperimixalet.epizy.com/zotubotivaxifiwup.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_off0000fa28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA28 5156 bytes
SHA-256: e6575102891b8978edf5bb1424786c0f8005ec391c8cfff1ac8589d1dde66df4
font_01_sfnt_off00010b8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8A 10416 bytes
SHA-256: 2fd07d083c628ccd436a7210b1ecee495cb1ba4283352970c5a0c1b96136c947

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