Malicious PDF — malware analysis report

Static analysis result for SHA-256 0578fd7d5b595c59…

MALICIOUS

PDF

83.8 KB Created: 2021-03-28 07:01:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7391e7e45b8cf9fa2515f0708ab66c13 SHA-1: 939cdf046d34ba0b2f1517e94d0ebab159aea3f9 SHA-256: 0578fd7d5b595c59c2d0c44d27f34b4e745d951be161beff4617b166319e0ed5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/strik?utm_term=who+is+the+villain+in+artemis+fowl PDF link annotation
    • http://kosamaritaj.getenjoyment.net/cyberpunk_2020_sourcebook.pdfIn PDF document text
    • http://begimewabifax.getenjoyment.net/81249476873.pdfIn PDF document text
    • http://lisuzigerob.mygamesonline.org/contenedores_de_reciclaje_por_colores.pdfIn PDF document text
    • http://gatofupimekow.mywebcommunity.org/mevame.pdfIn PDF document text
    • http://feludekinopotas.scienceontheweb.net/xopikisela.pdfIn PDF document text
    • https://cdn.sqhk.co/pujapipiwat/76a5ian/22444553300.pdfIn PDF document text
    • https://cdn.sqhk.co/sozasusu/7whbggi/dhoom_4_cast_2019.pdfIn PDF document text
    • http://gubixazolela.sportsontheweb.net/how_to_measure_the_chainsaw_bar_length.pdfIn PDF document text
    • http://vedivux.mygamesonline.org/29766653155.pdfIn PDF document text
    • https://cdn.sqhk.co/fekigimuzib/gdjdpjc/extreme_racing_suv_simulator_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/pasededi/dGie8ib/petuxusojusejefowomalavi.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/brjdqhg/pixel_gun_3d_mod_apk_2019_ios.pdfIn PDF document text
    • http://nebuxopav.mypressonline.com/54391418446.pdfIn PDF document text
    • http://pexulisinipev.sportsontheweb.net/begigo.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/QRugjja/fukuku.pdfIn PDF document text
    • http://midunetojonawiw.mywebcommunity.org/jejivakakalegut.pdfIn PDF document text
    • https://cdn.sqhk.co/rufosopufu/dghmxih/dinikona.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://geforagegi.atwebpages.com/zosyn_davis.pdfIn PDF document text
    • http://xetaratof.rf.gd/lugaxuxidoxuxawas.pdfIn PDF document text
    • http://muvosexuwefap.epizy.com/jidejumubikaka.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_off00010ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC1 5172 bytes
SHA-256: 135da7bfa9b00e7474a09d5c1d25688af59970adb6345c03750dd0501378f65a
font_01_sfnt_off00011c47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C47 11128 bytes
SHA-256: a7be3bae14265ef7a9d445e715846af9fcdd75c5cebe553ca29e4cbdeae5d6dd

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