Malicious PDF — malware analysis report

Static analysis result for SHA-256 99efe72e059f2937…

MALICIOUS

PDF

77.9 KB Created: 2021-03-20 20:36:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 003cfef32dab7bcd99d20d84bd92fb07 SHA-1: 1c9377a4fbc8aaf1cb9175ec7f4000f783e3f12f SHA-256: 99efe72e059f29376e7f56785e3ac532772a7a08d992187ac78baba6fde532c2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

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://kuzutuzo.ru/wix?keyword=medida+de+seguridad+penal PDF link annotation
    • http://registrat.space/goruzebikupivapadidusifu3m5q2.pdfIn PDF document text
    • https://cdn.sqhk.co/janimivaxo/Tgghfii/smartwool_gloves_size_chart.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/O8gjmOx/diversion_program_for_shoplifting_misdemeanor.pdfIn PDF document text
    • http://kigurumi.org/clasificacion_de_los_numeros_decimales2f6yu.pdfIn PDF document text
    • https://cdn.sqhk.co/susojareb/hicZjhD/pocket_frogs_promotional_breeds.pdfIn PDF document text
    • http://fitit.space/17820136620ysg0j.pdfIn PDF document text
    • http://procripton.com/379946532232zzjx.pdfIn PDF document text
    • http://dimax.website/voriponogolug4pti.pdfIn PDF document text
    • http://legendarycraft.ru/pufuwupuln0j3d.pdfIn PDF document text
    • http://cosmosqrab.online/anthony_de_mello_awareness_book7c5lh.pdfIn PDF document text
    • https://cdn.sqhk.co/tuseliwi/ajbPwhh/97263823650.pdfIn PDF document text
    • https://cdn.sqhk.co/fatobaliv/fkRgd4B/om_nom_run_play.pdfIn PDF document text
    • http://hdsamara.ru/sunbeam_twin_heated_blanket_sizenw0h9.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/b72e7e3c-12d6-4648-8d5a-102cf5f127dc/binary_trading_guide_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/optiplex_5070_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/825b62a4-ddc9-4dac-98e9-259d9a9aa61d/topakujewusot.pdfIn PDF document text
    • https://s3.amazonaws.com/kafises/wunofazebepikadig.pdfIn PDF document text
    • https://b634734f-67aa-4edc-9b69-dcf7610e4690.filesusr.com/ugd/c86859_932e720a76094da98ba1600c8555ca10.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcca540c-bb21-4297-8a69-8e340758d7bd/89070544132.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93fcafe9-954b-4b82-8a19-c4403c7de051/john_deere_lawn_tractor_maintenance_manual.pdfIn PDF document text
    • https://b5d51143-f34a-4a4f-9265-6917490cb775.filesusr.com/ugd/9f69bd_a7afd8cf7034430ba44feda553adbd29.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a96013bf-7746-4bcb-b0e1-7bfe821a0cab/how_to_grow_red_romaine_lettuce.pdfIn PDF document text
    • https://b2fc43c4-60ab-4dc1-a1c8-84833fda4e2a.filesusr.com/ugd/37321e_d2dd1b05b98044f2a6954bd24cb93cea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/good_morning_love_photos_hd.pdfIn PDF document text
    • https://7f1158f2-e44e-4cac-991a-806210d1dc3e.filesusr.com/ugd/e4a8e1_9cf46c4f6e824b53999e403dbc0ef26b.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_off0000ec75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC75 5132 bytes
SHA-256: 98726abdf36fb50d11d0d6e3a3e5372dbe777719d750ee2fcf6b0c0429a974f8
font_01_sfnt_off0000fe00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE00 13828 bytes
SHA-256: 8cbb737d89772e5d92a8915c1998d71bba85a0eae3b603692b780be7a780554c

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