Malicious PDF — malware analysis report

Static analysis result for SHA-256 58714bb26a6dca44…

MALICIOUS

PDF

67.6 KB Created: 2021-02-10 12:56:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6dbc8e2a9bd8a1a9be9c5b34ebd50d3a SHA-1: dc1d62d4049bd00e509e4585910fbe1dcc71cc44 SHA-256: 58714bb26a6dca44dfe96153b842dd2b75e5557d58a6d2af50ed05dd97398340
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=cursive%20capital%20j%20worksheet In PDF document text
    • http://confirmyourverifiedbadge.com/zogajogijejubutibibif5cqc0.pdfIn PDF document text
    • http://best-ital.fun/jackson_kayak_fun_runner_70cgkde.pdfIn PDF document text
    • http://petersikdar.com/violet_evergarden_episode_143ym6k.pdfIn PDF document text
    • http://sarkife.site/aambala_video_song_starmusiqg1w50.pdfIn PDF document text
    • http://xsale.trade/sim_brothel_2_downloado82wh.pdfIn PDF document text
    • http://lnstagram-office.com/gujarati_character_mapl430t.pdfIn PDF document text
    • https://cdn.sqhk.co/xaxovowupofa/VC4LlAP/minecraft_diamond_armor_costume_diy.pdfIn PDF document text
    • http://arboozfilm.com/mifuxozumotvjcjx.pdfIn PDF document text
    • https://cdn.sqhk.co/lolatonuvesa/SLbJRib/yellow_anti_stress_balloon.pdfIn PDF document text
    • http://proita.space/how_to_pvp_bdo5w8xs.pdfIn PDF document text
    • http://uscovidcharts.com/cycles_encyclopedia_downloadkv3wp.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/punurum/14820119435.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/how_to_scroll_in_android_using_appium.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/arteriovenous_malformation_of_cerebral_vessels_treatment.pdfIn PDF document text
    • http://nefaped.epizy.com/58250472787.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_off0000cc50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC50 5220 bytes
SHA-256: 2fc3748291e9c5c7abbc57c2b13c6e94d34b6ea7d3924e4546025aee02f4d7d2
font_01_sfnt_off0000de23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE23 11044 bytes
SHA-256: 6c1bfe24e91270e2091caa0d03bac1b9d7a7762f2596915c3ef9d72a64a02e9b