Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1c224eab428ebe…

MALICIOUS

PDF

85.4 KB Created: 2021-03-04 18:56:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e0a3c69841e02a59961b724e1cad0717 SHA-1: 9f9c0045b26bd3571dc2f2ffb7e1614dc6f6fc9b SHA-256: 3d1c224eab428ebedc70e719d0f5b44ca33a7e52b3230006b9a5f8aadecc5fec
126 Risk Score

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 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=how+to+start+python+3.8 PDF link annotation
    • http://zenajok.medianewsonline.com/3961460373.pdfIn PDF document text
    • https://cdn.sqhk.co/ninujamezol/geFlhhV/jazagegofewubezelozave.pdfIn PDF document text
    • https://cdn.sqhk.co/fomolunuvufa/xqgjhj3/deforeg.pdfIn PDF document text
    • https://cdn.sqhk.co/sejejajoxej/8jf52hg/dubai_hotels_7_star_price.pdfIn PDF document text
    • http://kifopelidito.mypressonline.com/tatukewakivukaxubevusisi.pdfIn PDF document text
    • http://bhd-management.space/tozegokehcmfj.pdfIn PDF document text
    • http://antonioit.fun/xumabowa3mj.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekoxes/6jjCY51/98076433126.pdfIn PDF document text
    • https://cdn.sqhk.co/ralapogifur/gh0H4ji/xepadezenasipakozurereku.pdfIn PDF document text
    • http://hookup153.fun/how_to_assemble_top_paw_dog_cratecffcc.pdfIn PDF document text
    • https://cdn.sqhk.co/wupifufexix/Sf6bzzQ/fexufoxuwuxafovodab.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/gdygdii/tesakizoxovovemozeme.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/jdjfiaG/62890843488.pdfIn PDF document text
    • https://cdn.sqhk.co/jivumigen/ARu5ggg/soccer_manager_games_unblocked.pdfIn PDF document text
    • http://vehicleusains.com/donupukizupesidewadibevx2.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/what_is_on_an_autopsy_report.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/gezejoputiwinu/xuvakiliwaz.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/sovepakegazarujiberivu.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/alfresco_open_source_free.pdfIn PDF document text
    • http://pivimufe.atwebpages.com/85972681843.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/increase_decrease_percentage_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/bamikomivipozazos.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/94643044602.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_off00010df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF4 5420 bytes
SHA-256: 8b4f254ad595a3586994eec6d8cf23c9a0f8e072230fb26b7793fb65336bc3a8
font_01_sfnt_off00012075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12075 11700 bytes
SHA-256: 2f4622fb98c2b3506cf7e221cc8894c2c255d2d2835c9f8cc74840a99778f505

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