Malicious PDF — malware analysis report

Static analysis result for SHA-256 9509a3d4942cbfcf…

MALICIOUS

PDF

64.1 KB Created: 2021-02-11 13:04:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2e37dc6779ac4171da2ea1d4e8682a14 SHA-1: bc2922777d1e01eb59bb4f714e37c3fae796df10 SHA-256: 9509a3d4942cbfcf2a05f852c2dc0b98fc607fc3d81270214cc040bc97419684
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://seumenha.ru/123?utm_term=ma%25C3%25A7+tv+apk+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387703/normal_600b573b57ed3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382773/normal_602096add4de8.pdfIn PDF document text
    • https://wabegikabakupoz.weebly.com/uploads/1/3/4/6/134668284/goxaneveporejawemoku.pdfIn PDF document text
    • https://zedabobosarafon.weebly.com/uploads/1/3/0/8/130813357/pezowama.pdfIn PDF document text
    • https://gofadoden.weebly.com/uploads/1/3/4/6/134615513/4892473.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/mixanaz/facebook_cover_photo_photoshop_template_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/8764078355.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/correct_plural_form_of_bronchus.pdfIn PDF document text
    • http://tapegazopiguw.rf.gd/graduation_name_card_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/dabam.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/10743890973.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/73467219919.pdfIn PDF document text
    • http://pavefobigemaxe.rf.gd/broadcast_receiver_in_xamarin_android_example.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/wemujed.pdfIn PDF document text
    • http://zufagubiles.epizy.com/vidmate_mod_apk.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_off0000baca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBACA 5300 bytes
SHA-256: af867cd56152a02ab8efa9f4c4a0641349a82bf4cc2f56739f7a46e87e928905
font_01_sfnt_off0000cd09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD09 11856 bytes
SHA-256: 17a8904b0ee246261df0d07cc4091ba94eeab4e171c1cd187201c320f119b50c