Malicious PDF — malware analysis report

Static analysis result for SHA-256 9194f4e951f5f096…

MALICIOUS

PDF

81.7 KB Created: 2021-03-16 05:05:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3deb857e0c9931a84648bc661845d457 SHA-1: ecbe1857de23c56de24ca9bb6180ac0936131392 SHA-256: 9194f4e951f5f0963b4c79d0e381c86bce5037ee4288f6a6de4bd2e3e52630f4
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL leading to a domain associated with phishing and link farming. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/123?utm_term=jigsaw+puzzle+template+4+pieces PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490736/normal_604d1cad0c168.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/uialjhD/68425731613.pdfIn PDF document text
    • https://cdn.sqhk.co/silinetufid/j1ACjdR/22445871350.pdfIn PDF document text
    • https://cdn.sqhk.co/zizenozi/h2grgfa/tomuvi.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/jgdiciO/race_the_traffic_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465694/normal_604924ff50318.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482405/normal_6000fba0e7f6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388050/normal_602239b5e55f2.pdfIn PDF document text
    • https://cdn.sqhk.co/vadetegubufo/ijieghV/alienware_monitor_34_curved_gaming_aw3418hw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505096/normal_5ffb4bacba036.pdfIn PDF document text
    • https://cdn.sqhk.co/nugizape/jthbfj0/41736715718.pdfIn PDF document text
    • https://cdn.sqhk.co/nasubivapu/EWlTdhd/zombie_desktop_live_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/tixunadegu/3AnYUje/nusogimusegewosenusija.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/proceso_de_investigacin_de_mercados_tursticos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/coreldraw_cover_book_template_free.pdfIn PDF document text
    • http://notovagewalarin.epizy.com/bajazebiwokeripavedopobub.pdfIn PDF document text
    • http://dufobirufo.atwebpages.com/fitbit_charge_2_hr_xl_band.pdfIn PDF document text
    • http://baxewape.myartsonline.com/como_crear_un_archivo_txt_en_la_terminal_de_linux.pdfIn PDF document text
    • http://wiroweri.rf.gd/observable_canonical_form_state_space.pdfIn PDF document text
    • http://bumurulepowele.myartsonline.com/electronics_questions_and_answers_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/attarintiki_daredi_video_songs_free_320kbps.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/printable_math_worksheets_adding_and_subtracting_fractions.pdfIn PDF document text
    • http://vuxomukixade.epizy.com/the_world_in_2019_economist_free.pdfIn PDF document text
    • http://rokidibamufoduv.epizy.com/naruto_shippuden_rpg_mod_apk.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_off00010100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10100 5376 bytes
SHA-256: d7c61517e2415da6845d1cbe7e042aed25cef51279ae4799a50009b17032774d
font_01_sfnt_off00011365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11365 11140 bytes
SHA-256: 1f83ef32215e135416807b2a365bfcc500877df06fc65874c62a603e9ef944ae

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