Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe48a378d7098921…

MALICIOUS

PDF

95.1 KB Created: 2021-04-21 20:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f3b2299cbb43072cbd3b9de60499d13e SHA-1: 5a338f5959b51d94ee5b8b5a170f841dd71e818e SHA-256: fe48a378d7098921e1ab2e8e83f2dd2d5fd3656e37dcc76680980c0f7402c9ae
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with a high probability of being malicious. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of external URIs and a link farm suggests the document is designed to redirect users to potentially harmful sites, possibly for phishing or malware distribution.

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://soxebez.ru/strik?utm_term=dr.+jason+fung+diabetes+code PDF link annotation
    • https://cdn.sqhk.co/gifitebona/jahcuic/lukas_nelson_shooter_jennings_songs.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/72476059611.pdfIn PDF document text
    • https://cdn.sqhk.co/wixumenez/hhahe0C/viruses_vs_bacteria_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/vonirosidejo/i1KaFjc/fps_shooter_commando_free_fps_shooting_games_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/etghhg2/jet_ski_hero_racing.pdfIn PDF document text
    • http://juxumigine.mypressonline.com/1611_king_james_bible_with_apocrypha_large_print.pdfIn PDF document text
    • https://degapepe.weebly.com/uploads/1/3/1/8/131856160/1350532.pdfIn PDF document text
    • https://revapukas.weebly.com/uploads/1/3/5/3/135323612/b2993b81e3776.pdfIn PDF document text
    • http://tediwaxivuj.sportsontheweb.net/structure_of_ebola_virus.pdfIn PDF document text
    • http://usecabinets.xyz/rs3_familiarisation_guidepehuv.pdfIn PDF document text
    • http://lomuwugevona.getenjoyment.net/homeless_bird_audiobook.pdfIn PDF document text
    • https://fanizoliboligom.weebly.com/uploads/1/3/1/0/131070566/9c958a492d.pdfIn PDF document text
    • https://cdn.sqhk.co/gutinisiv/fPghGgf/77125568011.pdfIn PDF document text
    • https://cdn.sqhk.co/virixerusupa/jSJehws/anonymer_browser_android.pdfIn PDF document text
    • https://cdn.sqhk.co/wixumenez/qHjdif6/zifiwevufodipiw.pdfIn PDF document text
    • http://about-igsupport.com/formato_de_nomina_sencillo3eslh.pdfIn PDF document text
    • http://xagakojitogiva.getenjoyment.net/59868970955.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wiloradakuno.onlinewebshop.net/44270237384.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/tuntunir_boi_download.pdfIn PDF document text
    • http://pixafur.atwebpages.com/58976039925.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_off0001374a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1374A 5404 bytes
SHA-256: c234ce2260d18040cd279637ac5a1ba5cfe3dad1efa59bc25c1df60600cbc2a7
font_01_sfnt_off000149ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149CA 10948 bytes
SHA-256: 7cedea322b30eeaf70587a6911e9fbbca3ec9791fe7de8f078b7f9d63b1439ca

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