Malicious PDF — malware analysis report

Static analysis result for SHA-256 a88ea1f126f83293…

MALICIOUS

PDF

74.3 KB Created: 2021-02-14 10:57:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 594d3dd7116ee502dbae1ffbe6ae645d SHA-1: 8c916dbea213bf2a533b813e7d7cb62b2abc98bc SHA-256: a88ea1f126f8329395819e8d1e28b83f57d82e5c4173370c65f34ce357abac39
136 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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://maypoin.ru/123?utm_term=watertown+high+school+wi PDF link annotation
    • https://cdn.sqhk.co/bupewazadufa/jaUhgK8/chicken_invaders_5_steam_christmas_edition_multiplayer_download.pdfIn PDF document text
    • https://cdn.sqhk.co/ponesigis/ahchche/titojota.pdfIn PDF document text
    • https://cdn.sqhk.co/nopavoboriru/evd8rkw/51237892897.pdfIn PDF document text
    • https://cdn.sqhk.co/noviraxat/gc5fIja/migitamibimixalamonu.pdfIn PDF document text
    • https://cdn.sqhk.co/linigurep/gupUsih/craftsman_450_tool_set_review.pdfIn PDF document text
    • https://cdn.sqhk.co/jesisoritet/aZ9rUgj/tropico_5_walkthrough_ign.pdfIn PDF document text
    • https://cdn.sqhk.co/laxefotogulo/jijamTZ/mofapabokopenurivo.pdfIn PDF document text
    • https://cdn.sqhk.co/jekefebiba/gJm8jdO/baking_recipes_without_butter_or_margarine.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/daniwodug/beaglebone_black_wireless_reference_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/tedapogasowivanig.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/icao_annex_15.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/magnetism_worksheet_for_5th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/lanusozolezuvasekisoloka.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/gross_hematuria_evaluation_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/tekuxolidovakedijezolote.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/bumogusexakamesivumuxezon.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/3724418656.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/5331642517.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_off0000e3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CB 5168 bytes
SHA-256: 34f1bc705324d185f9b17e855c66fdcee87dd9cd9d319be3e2f835a318365c4e
font_01_sfnt_off0000f575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF575 11964 bytes
SHA-256: d871f3adb3bca4bc552758a202a05a3e0d39de69a994cda931fd2789048a33cd