Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6d3cb256a71b82e…

MALICIOUS

PDF

84.5 KB Created: 2021-04-16 00:11:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0601427ec588dd7f0ea28dcb3843a3e8 SHA-1: 5788f00cc8c67a90305ecf1922e4f8909e50a328 SHA-256: c6d3cb256a71b82e4fe917882bd1b76be79b6ff2f16eafaca56fcbdf9a77b28b
134 Risk Score

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. It uses an urgency-based lure. 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 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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://crophysi.ru/strik?utm_term=gerald%2527s+game+book+pdf PDF link annotation
    • http://bloomwithdeanna.com/change_background_color_android_studio_codeya569.pdfIn PDF document text
    • http://uose.xyz/how_many_nitrogenous_bases_are_in_a_nucleotiden0izx.pdfIn PDF document text
    • http://luranowebereni.22web.org/objective_agronomy_thava_prakash.pdfIn PDF document text
    • http://fakaripeti.xyz/cisco_air-lap1142n-e-k9_user_manualuzxxg.pdfIn PDF document text
    • http://baugroup.info/amazon_online_arbitrage_step_by_step74vt6.pdfIn PDF document text
    • http://reduslimitalia.site/37595580105hbfpi.pdfIn PDF document text
    • http://raicen.com/wogotipa19bv.pdfIn PDF document text
    • http://itdomen.fun/warm_bodies_full_movie_with_malay_subtitlesterwb.pdfIn PDF document text
    • http://meetsol.xyz/when_can_you_book_disney_christmas_2021gacgg.pdfIn PDF document text
    • http://artelamp.store/spirit_animal_quizif7mg.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/bc2aa274-960c-4317-93f3-a934350d947f/how_to_rehab_an_ac_joint.pdfIn PDF document text
    • https://84d5b3ab-51dd-4312-87b7-51df18fb3b26.filesusr.com/ugd/9ea9b6_ad7e31ad7d6e403cb6ccc60088b6f2b5.pdf?index=trueIn PDF document text
    • http://konoxomofejon.epizy.com/gofawefodisatolizawoje.pdfIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_61cefa10cd5e437382cafedd79c8f606.pdf?index=trueIn PDF document text
    • http://kagiwabiluwotel.epizy.com/yukos_arbitration_award.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/603982e6-e7c3-47f2-b87a-9f8a7c20dbd6/wf-2630_change_ink_cartridge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe8de9f0-5f6f-41ac-aef8-7990b1a2ddf0/shimano_105_r7000_rear_derailleur_dealer_manual.pdfIn PDF document text
    • http://mimitudoxofi.rf.gd/51166839730.pdfIn PDF document text
    • https://2b81f3f0-3f46-42ff-87a7-5865dd96cd3c.filesusr.com/ugd/fb41f9_1e6eb9c623e74341a974ba391da14359.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fffded97-9a07-4486-aca1-a9c5ee25f5d1/my_laptop_keyboard_is_not_typing_numbers.pdfIn PDF document text
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_0d71118ae0674740b757a26fffbc8e00.pdf?index=trueIn PDF document text
    • https://22449060-8e30-4723-8828-967625cce342.filesusr.com/ugd/eddc50_162104668bca40cbb06ab4d48e7ba9b6.pdf?index=trueIn PDF document text
    • http://gojejamajutemus.epizy.com/bali_indonesia_travel_guide.pdfIn PDF document text
    • https://b8e64ff8-a522-4625-8e91-70fe47930cb2.filesusr.com/ugd/37987b_248819fee1bd4a49a3a1721d638232cc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5870325-0e6a-416b-af69-e8e985a818ec/los_juegos_del_hambre_sinsajo_parte_2_mega_castellano.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_off0001075c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075C 5632 bytes
SHA-256: d3d1e66edddfe96bcb38e1dc40848c5750237cd80bcd3f2e50eaecc8aab5b14f
font_01_sfnt_off00011a73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A73 11864 bytes
SHA-256: 65e7af610b0bb8a996152234f472a48d9d59eb4978840ddb56006d467ffe6987