Malicious PDF — malware analysis report

Static analysis result for SHA-256 af0e91feac6db412…

MALICIOUS

PDF

66.0 KB Created: 2021-02-22 04:20:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 408e4279b6e2dfb07221c2ebc0151334 SHA-1: ff1a5fd270b02e33d2029e909ca494734d2989b8 SHA-256: af0e91feac6db41224e4d978f465c7bccb2158b503268e1dcc5ce31ac6dabf75
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=apush+amsco+answers+2020 In PDF document text
    • https://cdn.sqhk.co/jonuwezipagi/JoijjgM/wabixufepekekuwo.pdfIn PDF document text
    • https://cdn.sqhk.co/nilofixogezu/vggihga/16126912658.pdfIn PDF document text
    • http://lovechat24.club/foseloj5tejm.pdfIn PDF document text
    • http://agentsoft.space/is_it_good_to_cook_in_air_fryerseadp.pdfIn PDF document text
    • http://on-arenas.com/jisavegakusedipufyvhmp.pdfIn PDF document text
    • https://cdn.sqhk.co/sosobita/gekqghR/dealsperk_online_shopping_deals_coupons_apps.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluxoni/fZePGay/super_mario_bros_emulator_download_unblocked.pdfIn PDF document text
    • https://gesunewa.weebly.com/uploads/1/3/1/4/131438127/2614297.pdfIn PDF document text
    • http://letnesil.xyz/31894539273b3pzm.pdfIn PDF document text
    • http://atomlinux.com/wuxupexemikumakosurezetim7foqb.pdfIn PDF document text
    • http://vorecan.space/5_ejemplos_de_realismo_magico_en_como_agua_para_chocolate5ddwj.pdfIn PDF document text
    • http://golosa-spasibo.ru/unfollowers_and_ghost_followers_for_instagram_apkunkpz.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/igzgegg/19562930909.pdfIn PDF document text
    • http://dvertsoff.ru/wavaguwetogimixujezugo6zzeb.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/lusabifef/arduino_code_formatter_online.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/captain_planet_cartoon_in_urdu_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/13018844740.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/wipeout_drum_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/busodeduz.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_off0000c614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC614 5496 bytes
SHA-256: 9162d504779e95714d9a4c0a620754014e6201195807196f866d8b33940206b7
font_01_sfnt_off0000d8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A9 10116 bytes
SHA-256: 9037e39ac6f4f20590a77874762430f3c54bdd0416081f942d2ac40f39db841a

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