Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1a53f1bfba06412…

MALICIOUS

PDF

69.2 KB Created: 2021-03-02 05:39:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 25fe23e03453602c03820d066691919b SHA-1: c4d5a4e017db293f2b0d64623b9dd25835ba2d79 SHA-256: c1a53f1bfba064126b3f69a3accb8a376390cbf1cb9834d8f129606eea980fe3
136 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
  • 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://gimoguvi.ru/wix?keyword=calculus+ap+edition+fourth+edition+pdf PDF link annotation
    • http://misstourist.info/reneret86is.pdfIn PDF document text
    • http://firstsecu-paypal.com/devatavitifikeletazapelntc6n.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/fU2LWid/street_racing_games_ps2.pdfIn PDF document text
    • http://summerita.fun/88506986819wexce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465128/normal_5fe37ff666e8a.pdfIn PDF document text
    • https://cdn.sqhk.co/dagufiwus/ifjuHji/zavipomiserolaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369305/normal_5ff772286331f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402488/normal_60257e95570ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406228/normal_5fcb598b90edd.pdfIn PDF document text
    • https://cdn.sqhk.co/kezavilageg/hbidSQe/jokiv.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/84659413534m9gsk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465389/normal_5fe4f0c397d6a.pdfIn PDF document text
    • http://usejus.club/project_manager_remote_jobs_india7qwlu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451019/normal_5fd5f4dd4b58a.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/fezenur/aorus_master_z390_overclocking_guide.pdfIn PDF document text
    • http://geforagegi.atwebpages.com/how_do_i_reset_my_maytag_front_load_washer.pdfIn PDF document text
    • http://patudesaruvob.atwebpages.com/48623528158.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/supersonic_tv_troubleshooting.pdfIn PDF document text
    • http://lijowavatajo.myartsonline.com/vifesebad.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_off0000d2e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E0 5148 bytes
SHA-256: 3a50831ab1f6c41334cebd4dfab00b2d4562a6b4757153bfa3f7b7efc74f87e1
font_01_sfnt_off0000e455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE455 10224 bytes
SHA-256: 2540c2d11da0259b40d5fdbb224292c5ed95bd4c34b98c6efc79ade2ae3359fc