Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f10227766e288a3…

MALICIOUS

PDF

70.5 KB Created: 2021-02-24 11:39:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 724cbf74373541fea929b186791f9664 SHA-1: 8fe4df835fe29808bbc5fe70a01bce7d25c7fb1c SHA-256: 9f10227766e288a3891c806da975a62980885b7ba2eee7a52771796117a3db57
196 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
  • 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.
  • 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://jacksth.ru/wix?keyword=how+to+hack+knights+and+dragons PDF link annotation
    • https://rixijufufapug.weebly.com/uploads/1/3/4/4/134497528/mefosuku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387040/normal_5fd920b15a5b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474450/normal_5ff9c8ef0105c.pdfIn PDF document text
    • https://romugazasemagop.weebly.com/uploads/1/3/4/8/134897733/tepolimal_fopajoret.pdfIn PDF document text
    • https://cdn.sqhk.co/novozefox/hghbeqh/funny_hippity_hoppity_memes.pdfIn PDF document text
    • https://tiwabegi.weebly.com/uploads/1/3/0/8/130874513/3438823.pdfIn PDF document text
    • https://kitawusew.weebly.com/uploads/1/3/4/2/134234725/besulewewuviv.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/nuselufuzo/xadukejekanenexala.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/how_to_operate_a_microwave_convection_oven.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/7588409174.pdfIn PDF document text
    • http://baromar.epizy.com/schengen_visa_application_form_portugal.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/32886886486.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/35485839697.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/laman_bhole_baba_song_from_djpunjab.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/33134327966.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/tegabuvavidexowanoxigifok.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_off0000d780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD780 5284 bytes
SHA-256: ba6db5daa6b77690ce1989eb4355b4af35bcf717c98a923e061377e0b7ab8009
font_01_sfnt_off0000e984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE984 10412 bytes
SHA-256: 0fc55846e2afdd6092fd7d189c49e16d58ef04681d49e2f012f36848ef8f1aba

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