Malicious PDF — malware analysis report

Static analysis result for SHA-256 48a4f66f912138a5…

MALICIOUS

PDF

76.0 KB Created: 2021-03-20 12:50:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fdbd49b3fa82497e4c53abcf461c8010 SHA-1: 525702ed43f6fbd545b6d996f9bed58f3b03f574 SHA-256: 48a4f66f912138a5d403e08b7e4686a49f2fbb02227565f0e7285c334958cd61
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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/award?keyword=amenity+horticulture+pdf PDF link annotation
    • https://cdn.sqhk.co/murofoli/jhhjhcB/97990512116.pdfIn PDF document text
    • https://cdn.sqhk.co/sosexazefip/jaggghZ/ios_waze_apps_like.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/VSfJwjb/chinese_historical_war_movies_2017_with_english_subtitles.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443803/normal_6020b700780e2.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/gcY00hj/smart_tube_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/wedekimelol/bhhtWgc/4180467534.pdfIn PDF document text
    • http://mivetys.xyz/how_to_pair_plantronics_voyager_legend_to_iphone_7tjdpp.pdfIn PDF document text
    • http://zoosalon.org/98838805868759yq.pdfIn PDF document text
    • https://cdn.sqhk.co/togixulala/8jheQo3/guide_michelin_restaurant_paris_montparnasse.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471252/normal_5fdac8d60f4d4.pdfIn PDF document text
    • https://cdn.sqhk.co/wefikoke/hiKjgfD/pdf_editor_add_pages_online.pdfIn PDF document text
    • https://cdn.sqhk.co/guwaloxipete/biagigi/dunia_games_top_up_ff_diskon.pdfIn PDF document text
    • http://goldstein.berlin/betiyan_new_songjvx76.pdfIn PDF document text
    • https://cdn.sqhk.co/supopareso/ibUrijm/voicemail_icon_won_t_disappear_on_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_49c90bf4ab564a5680ef765663eeeff2.pdf?index=trueIn PDF document text
    • https://97a45c9e-1ab5-462a-bfe2-fded34b9a8b9.filesusr.com/ugd/b50c55_e17d27c28ce04bd29bb5082fea8361ad.pdf?index=trueIn PDF document text
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_f9998be42f4146728585cc682ebca242.pdf?index=trueIn PDF document text
    • https://2fe0a9f4-4d23-48c4-8711-d5fb25093877.filesusr.com/ugd/683a75_fd6cb82eff7e472081791ac54508527d.pdf?index=trueIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_7adb140985de47e9bab4319c9a3c6ceb.pdf?index=trueIn PDF document text
    • https://ecab545c-19d2-4654-b6ac-fb8b9749f5ba.filesusr.com/ugd/e5412a_ef46849e5bb043319bff8de76905bd4f.pdf?index=trueIn PDF document text
    • https://adc67df4-9ac4-4169-8225-f8d60376216a.filesusr.com/ugd/a1c2c7_27821993790541ecaa34145f12bb9e07.pdf?index=trueIn 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_off0000edc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC1 5096 bytes
SHA-256: a604ad98f5c8beecf1a221068f91649f1aa8347f2e550d3ffd7a93e771575c71
font_01_sfnt_off0000fefb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFB 10528 bytes
SHA-256: 0076f413e062a45da3d19d4a0058b8c0c67bf966f91bbb34419a43100a7d3f0e

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