Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9f9b6033d49cf35…

MALICIOUS

PDF

64.8 KB Created: 2021-02-23 18:48:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e1881afb06bcc3a6a97d0db7b2e65ff3 SHA-1: bbd916e7bdfd0425b863861ad6d51dea6ed3c98e SHA-256: b9f9b6033d49cf35e8bba7fe43e9204d4787d7fce7ebb7b93c3f678cb2053407
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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=juegos+de+maquinitas+para+android In PDF document text
    • https://cdn.sqhk.co/filodomazora/fgjhbji/74330591245.pdfIn PDF document text
    • https://cdn.sqhk.co/dodufiruw/jgxswii/who_s_gonna_be_your_man_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/vigeroti/jjhcheo/singing_pumpkins_mp4.pdfIn PDF document text
    • https://cdn.sqhk.co/wovupeni/jhiqjij/dadezidosijalazukifo.pdfIn PDF document text
    • http://sabeladiwuz.22web.org/2346146754.pdfIn PDF document text
    • https://cdn.sqhk.co/wejideduv/CfRhhDl/fedupobusesogezor.pdfIn PDF document text
    • http://minuzin.22web.org/nenetemepakomer.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/jcmjahh/easy_cake_recipes_from_scratch_without_baking_powder.pdfIn PDF document text
    • https://cdn.sqhk.co/fenajobuwer/cbnieDK/line_free_calls_messages_login.pdfIn PDF document text
    • https://wusedutewaxugag.weebly.com/uploads/1/3/1/4/131437839/843862.pdfIn PDF document text
    • https://cdn.sqhk.co/fagiseregu/icgfibF/slingo_50_free_spins.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/dazovosugev/95246209739.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/evaluate_expressions_worksheet_grade_7.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/formao_barbeiro_aveiro.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/86678498936.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/jebutuzosebudilemarojid.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_off0000beee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEEE 5364 bytes
SHA-256: 1a9a641c369d121f9805d494299b5c1acee7515a8db69c78da0dbe9fb25a3701
font_01_sfnt_off0000d108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD108 10780 bytes
SHA-256: 94e65a93c5bc06cf554156287684068f5c4be90b730131311200ba72f68977e3

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