Malicious PDF — malware analysis report

Static analysis result for SHA-256 64dd295d5b91376f…

MALICIOUS

PDF

83.0 KB Created: 2021-05-16 21:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: cfaf91666ac3f5123a693fc3b059aff0 SHA-1: 289a35468d22f0326732e13d3bbd089b95e8f405 SHA-256: 64dd295d5b91376ff79b7f37d1db5efa1ed9049de9ee8bd45dc3d5ce404cf6e9
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a high-severity 'PDF_SEO_UTM_REDIRECTOR_LINK' and a critical ClamAV detection. The embedded URL, https://lozipotod.ru/strik?utm_term=cuantos+metros+mide+una+tarea+de+tierra, is identified as a redirector likely leading to a phishing site. The ML classifier also strongly indicated maliciousness.

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
  • 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://lozipotod.ru/strik?utm_term=cuantos+metros+mide+una+tarea+de+tierra PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470035/normal_606c66e38ac1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413223/normal_605bdd759f5c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486036/normal_60204be9193ad.pdfIn PDF document text
    • http://liketime.fun/rikanpws10.pdfIn PDF document text
    • http://phulop.store/the_fall_guy_truck_jumpst8a59.pdfIn PDF document text
    • http://emmetrix.net/wuxigawijakurulutuvizogmq503.pdfIn PDF document text
    • http://vladport.ru/bank_management__financial_services_9th_editionioiu5.pdfIn PDF document text
    • http://nonretloli.site/best_case_for_moto_e6_plus8vf2o.pdfIn PDF document text
    • http://urologo.store/ap_chemistry_textbook_onlinetyny6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420238/normal_5fef00783e634.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/jusagi/crohn_s_disease_guidelines_acg.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/gureropirajut.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/free_microsoft_publisher_bookmark_template.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/the_beatles_yesterday_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/what_to_do_if_a_usb_device_is_not_recognized.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/kitchenaid_artisan_stand_mixer_matte_white.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/b._sc_and_m._sc_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/country_cost_of_living_ranking.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7D 4844 bytes
SHA-256: 23e4877da09fb350286d22343fa972e8036ad25c0d69a9342269c07d1d1c34e4
font_01_sfnt_off0000fcd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD1 13016 bytes
SHA-256: 4a51f6941bb068e9b14c2058c078259afd1e83cc4b98203d4a26c4b6cc00d9fe
font_02_sfnt_off000127bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127BD 16152 bytes
SHA-256: 379b758e65e9b37656e8de387f14e1ed5651a10e4933af748d58739bc3359644

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