Malicious PDF — malware analysis report

Static analysis result for SHA-256 99df246721562c99…

MALICIOUS

PDF

74.1 KB Created: 2021-03-14 00:16:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d77bb093ec66dcd1be66aa0884d2b489 SHA-1: 0dee0119749829ef8e1243371c63bcbaf0f51d2a SHA-256: 99df246721562c990de38065af77af360ed453c5b883adea7ebeb422d9597a7b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary suspicious URL pointing to a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://seumenha.ru/strik?utm_term=how+to+write+a+proper+sentence+structure PDF link annotation
    • https://cdn.sqhk.co/kuzosexiwugu/hii4Nge/dragon_city_breeding_legendary_2020.pdfIn PDF document text
    • http://netewe8.xyz/hyundai_avante_2019_manualosmtb.pdfIn PDF document text
    • http://ratamaperekeja.22web.org/bevidokizizokifur.pdfIn PDF document text
    • https://fagozozefixus.weebly.com/uploads/1/3/4/8/134846406/zilaruzep.pdfIn PDF document text
    • https://cdn.sqhk.co/mibupufek/MqoHjaR/starlight_city_car_racer_traffic_mask_3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464707/normal_600a89123d04c.pdfIn PDF document text
    • https://cdn.sqhk.co/fusojafiza/hXZlIjj/background_picture_for_windows_10.pdfIn PDF document text
    • http://boothattendant.com/marvel_avengers_infinity_war_trailerpcbti.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/jjcyjd6/drywall_mudding_labor_cost.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380383/normal_5ffba0cd511ed.pdfIn PDF document text
    • http://digitalcalakk1.xyz/the_power_of_positive_thinking_youtube_denzel_washingtonsdhak.pdfIn PDF document text
    • https://cdn.sqhk.co/fixosotefe/gge6SWW/65399315589.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387566/normal_60279c2630ade.pdfIn PDF document text
    • http://productwood.ru/nightforce_nx8_owners_manualvz596.pdfIn PDF document text
    • http://prod-fruit.space/information_technology_project_management_5th_editionvojcr.pdfIn PDF document text
    • https://lerafajim.weebly.com/uploads/1/3/4/6/134667367/3314096.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/zaxuledo/nine_go_tv_guide_melbourne.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/69502366085.pdfIn PDF document text
    • http://badakun.rf.gd/what_does_moca_test.pdfIn PDF document text
    • http://lejovoxi.epizy.com/how_to_wear_an_ergo_360.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/17656827713.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/ganglion_impar_block_ct_guided.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_off0000e5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F6 4948 bytes
SHA-256: 841f5902b1f356eb2590f4e1b0e4e0650411ea8b7b442157605a5a6b73568b78
font_01_sfnt_off0000f6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EA 10412 bytes
SHA-256: 42f6172163da6aeffb357e916ecc73565acda0ce7a30f9c539820ffcd12a0ca1

Open this report in the interactive analyzer, or submit your own file for analysis.