Malicious PDF — malware analysis report

Static analysis result for SHA-256 358e3196b84b8ef5…

MALICIOUS

PDF

91.8 KB Created: 2021-03-28 20:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c7c63b9ee6cc253145a17ebbe6ebfe94 SHA-1: 107dfa067fbbf47cb6f26a175cc66d2863ff9648 SHA-256: 358e3196b84b8ef562cb5d5e30882e2dd2b8961a608f3fb20c550cbbb882e2b1
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://fokemale.ru/award?keyword=curriculum+development+8603+pdf PDF link annotation
    • http://my-favshopg.online/hot_chamber_die_casting_process7k0wp.pdfIn PDF document text
    • http://dajexori.mypressonline.com/changing_dewalt_735_planer_blades.pdfIn PDF document text
    • http://sefegusekepuxa.mypressonline.com/mutiwezozugovutitu.pdfIn PDF document text
    • https://cdn.sqhk.co/karapazepot/gNjgjjj/aliens_drive_me_crazy_hack_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/Lhhiggg/gif_to_video_app_no_watermark.pdfIn PDF document text
    • https://cdn.sqhk.co/bafiweba/ihjfge4/pitoremibepupofit.pdfIn PDF document text
    • http://logunesunoj.medianewsonline.com/drrm_corner.pdfIn PDF document text
    • https://cdn.sqhk.co/mepowokugo/6RAhdhf/cartoon_supreme_wallpaper_girl.pdfIn PDF document text
    • https://cdn.sqhk.co/sutadejuna/0jiwjcC/49015255661.pdfIn PDF document text
    • https://cdn.sqhk.co/pafatewodoju/Iaf7qhe/cross_country_skiing_world_cup_news.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/0ifQRa5/dank_tanks_mod_apk.pdfIn PDF document text
    • http://sellforce.ru/xojasoleridipegcvvbu.pdfIn PDF document text
    • https://cdn.sqhk.co/fofateze/sgwigWl/cikara_burger_shoppe.pdfIn PDF document text
    • http://virona.org/717836735538zj1d.pdfIn PDF document text
    • https://cdn.sqhk.co/mikedeto/gqhg6hf/bird_box_cast_names.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/27601b2d-8fe5-49ff-858b-122da83e8a52/thinkorswim_application_for_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a64d8f0f-fd14-4596-8abb-10918aa6ee99/97309826607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68356446-d492-4658-92c4-3b274b37552b/juegos_de_cinema_panic_2_y8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45ebb887-bffe-43d6-a349-d0e06a161469/how_to_fix_a_ge_microwave_door_handle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/033a937d-3c0b-42fa-b301-de391e7830d6/is_relational_dialectics_theory_objective_or_interpretive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e46daa1-19b5-4a91-977f-dd1b2b983c5b/el_diario_de_greg_1_libro_resumen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0acb16c-6ba2-4642-8d3d-b756255526e7/vevivosupewezafire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84237f6f-1715-45fe-8bc9-831a5e26c1f6/bushnell_voyager_telescope_78-9570.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_off0001277a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1277A 5532 bytes
SHA-256: 665511abc345fea9e122d673e8a14a4d318b4924b6c2766a598325e4ce268407
font_01_sfnt_off00013a41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A41 11244 bytes
SHA-256: 78d2ba1cf1bca7356fa386dfc857c9b7e83f8f9c210767b8f0e6ac701d2f5318

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