Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c12144ca9a7b23e…

MALICIOUS

PDF

81.5 KB Created: 2021-03-25 15:53:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 333b10255fd937f2099a2ee9429d98f8 SHA-1: 2336b3ae7b890058bda7cd1108fdfaf1f4ba5b56 SHA-256: 6c12144ca9a7b23efef3487b70db7ed3f18419cddb2a986e1e556d0d9cbecd82
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that uses an image lure related to a 'Generac 4000exl parts list' to trick the user into clicking a link. This link, identified as an SEO redirector, leads to a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://baarspo.ru/strik?utm_term=generac+4000exl+parts+list PDF link annotation
    • https://cdn.sqhk.co/bumogebiz/dgdVyia/bombas_socks_price.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481516/normal_6027cf65eb63b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483388/normal_60052da82df5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443821/normal_6045f17c1d8a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410447/normal_6040efa52df3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373749/normal_5fc8a52230db8.pdfIn PDF document text
    • https://cdn.sqhk.co/relewimimoro/jeTYJMB/activecampaign_form_landing_pages.pdfIn PDF document text
    • https://cdn.sqhk.co/jegisizozul/Zichcx8/best_android_games_available_on_play_store.pdfIn PDF document text
    • https://cdn.sqhk.co/nigezufi/xZBYZjj/xurutituranidabikonigude.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378386/normal_5ff786fde4b44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414871/normal_6052dfa21d5d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450248/normal_601af4211652a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450158/normal_5fd3b90a3d762.pdfIn PDF document text
    • https://cdn.sqhk.co/jufebarur/he9zL61/army_builder_40k_9th_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/ejeibO5/while_true_learn_cyber_initiative_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475197/normal_5fcc277d1a2c6.pdfIn PDF document text
    • https://cdn.sqhk.co/kagitenoru/gc0uIjf/jukurodorapunametagifij.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/jhiGyhe/xobisunenodevada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417658/normal_6025abd0f0d50.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/figugipopar/kebetidijifitit.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/ledene.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/89250868707.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/13927327094.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_off0001035b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035B 5256 bytes
SHA-256: d984dbdb1a429a2e315f2c0f827159fa36513c4505390af3556f65e8ecbc0c3a
font_01_sfnt_off00011552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11552 10332 bytes
SHA-256: e8307e3c59eb80e5466a5246cbe127912e1497948a8ec0060fe03ba48cdc7eb3

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