Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed57eca75b5ce9f7…

MALICIOUS

PDF

71.3 KB Created: 2021-02-26 13:37:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3ad4b154e60ce606db50de93ddce8152 SHA-1: 629bf2ffc627dbc058c3b57d4c7ff5eb247357c2 SHA-256: ed57eca75b5ce9f7ddfeef1eed6c692b9db709195a43f70627ff3e0a7f57bdd0
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=everyday+use+quiz+pdf In PDF document text
    • https://jewupoma.weebly.com/uploads/1/3/1/4/131437657/a167e3.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/is_there_a_season_3_for_sword_art_online.pdfIn PDF document text
    • http://betijeduw.getenjoyment.net/is_the_ged_test_harder_than_high_school.pdfIn PDF document text
    • https://cdn.sqhk.co/ritasuxa/jeChgig/noluwikegobusibasiwizo.pdfIn PDF document text
    • https://cdn.sqhk.co/wigatozaduw/hitagf2/old_school_runescape_fish_stall.pdfIn PDF document text
    • http://foguwefo.iblogger.org/48174612635.pdfIn PDF document text
    • https://telozigigozato.weebly.com/uploads/1/3/4/3/134310186/tilaketipafedom-fobopob-fasevo-gavaz.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/hjf8oCE/rokagakuxi.pdfIn PDF document text
    • https://cdn.sqhk.co/dogilijesiwu/i6Pgcgi/playing_cards_bluff_game_rules.pdfIn PDF document text
    • http://dajexori.mypressonline.com/66998457991.pdfIn PDF document text
    • https://xoxomedeze.weebly.com/uploads/1/3/5/3/135308121/fisazupunogomewu.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/werowibovezoje/indian_constitution_in_bengali_free.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/waiting_for_the_barbarians_novel.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/respironics_bipap_s_t_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/reformas_borbonicas_consecuencias_en_la_nueva_espaa.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/raluxumotorerotuduzagu.pdfIn PDF document text
    • http://dumevurofif.rf.gd/soundcloud_go_free_apk_2019.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_off0000d8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A3 5300 bytes
SHA-256: 6112967e7a62388ec134a0704cdf896848911b18e56ea39702a50465d4dca074
font_01_sfnt_off0000ead2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD2 11200 bytes
SHA-256: 91f30134fb4cc4a8fb249cf4995348537ddc62bd53f827a9600a857aecc42e45

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