Malicious PDF — malware analysis report

Static analysis result for SHA-256 90b0318fd6f83deb…

MALICIOUS

PDF

131.2 KB Created: 2021-04-23 18:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 14c939c8874f7dd687cb222a066ddc61 SHA-1: 117c021adee8f112ab037c6d55d55cacc0cbf9b3 SHA-256: 90b0318fd6f83deb86ce3e273fe93fa01733ad9f3f715db91bd31a6fdeba443b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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://xajibur.ru/strik?utm_term=la+riqueza+de+las+naciones+adam+smith+cuantas+paginas+tiene PDF link annotation
    • https://cdn.sqhk.co/tajiwikiter/fehdVgf/tennessee_titans_news_music_city_miracles.pdfIn PDF document text
    • https://cdn.sqhk.co/nigulavax/dheGjc5/urban_hop_hip-_hop_kpop_infinity_bouncing_balls.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/age_regression_comicshsykg.pdfIn PDF document text
    • http://helpcopyright-service.com/kilabatinorakujodokit11az.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/aiia4jj/89950045247.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/gdWsLHA/the_sims_bustin_out_ps2_cheats_not_working.pdfIn PDF document text
    • http://form-copyrightservices.com/will_there_be_a_cyberpunk_2077_demoujomh.pdfIn PDF document text
    • http://trastqort.online/string_explorer_violin_book_1a6x6m.pdfIn PDF document text
    • https://cdn.sqhk.co/tijinujul/hcNiec9/91184175123.pdfIn PDF document text
    • https://cdn.sqhk.co/dafibuxoki/jajdgeA/schema_electrique_lampe_avec_detecteur.pdfIn PDF document text
    • http://waliduv.mypressonline.com/34119948727.pdfIn PDF document text
    • https://cdn.sqhk.co/mezewimaxus/iehgm5s/gluten_free_apple_crisp_dessert_recipes.pdfIn PDF document text
    • http://tortomsk.ru/2594424064z1pkh.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/bufilosobe.pdfIn PDF document text
    • http://luminar4-download.xyz/bmw_nav_6_car_kitaptbp.pdfIn PDF document text
    • http://salebox.shop/fernando_savater_etica_para_amador_capitulo_3_resumen81sc1.pdfIn PDF document text
    • https://cdn.sqhk.co/debefuki/oihgXha/76905178037.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/gimcgiI/tufotuv.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/arborists_certification_study_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481667/normal_605fa8ad27ea8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386605/normal_5fe6fdcfe49a1.pdfIn PDF document text
    • https://cdn.sqhk.co/guzelatolina/Ogd0eid/82683195628.pdfIn PDF document text
    • http://skidki-day.store/jemabaladazekobyckr7.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/bicarbonate_buffer_system.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370785/normal_602db10225b8b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0001c0ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C0EF 5604 bytes
SHA-256: 22d57cbd42129c0b9f8d6fe13071069eba728da9601bc745070bb7ce0215409e
font_01_sfnt_off0001d3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D3D5 12480 bytes
SHA-256: 471c132f06cbe49807877e68fda53e86b04dd728b3b00ba65bb24fa3cd1f782d

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