Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba9ca3c07a99085e…

MALICIOUS

PDF

67.6 KB Created: 2021-03-01 14:29:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 48f3cbc284f92e016f1b71ca8d26fc64 SHA-1: cd37ef42a5badfee1c299a642b4a63b2f70350cd SHA-256: ba9ca3c07a99085e8e00721a29e99b8031b3711ff94ce84e04eee42421a4ceb5
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://mezovuduw.ru/award?keyword=agatha+christie+poirot+season+10+english+subtitles PDF link annotation
    • https://cdn.sqhk.co/mewowoji/daifgfo/tasakuw.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/bghKhcY/dibibulojupazaze.pdfIn PDF document text
    • https://fakavenudir.weebly.com/uploads/1/3/4/0/134042443/sevaluwexorowinomuxi.pdfIn PDF document text
    • https://cdn.sqhk.co/dumudegurit/hUCIvgj/cops_chasing_robbers_games.pdfIn PDF document text
    • https://cdn.sqhk.co/godezixibufo/jf2YibL/bowmasters_para_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/baxijaxazixi/v3ZQ4ib/instalove_best_popular_hashtags_for_instagram_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/sifomujotaxa/iibiahi/pizunawiniwuguwireno.pdfIn PDF document text
    • https://cdn.sqhk.co/zapimafe/jjpdijB/jinebolaxaratuxesegumotu.pdfIn PDF document text
    • https://sibitolifi.weebly.com/uploads/1/3/4/7/134732274/sijeba.pdfIn PDF document text
    • https://cdn.sqhk.co/gemadaruvow/uiaghLY/game_summoners_war_l_u.pdfIn PDF document text
    • https://cdn.sqhk.co/dodazija/jesjeLZ/47564617244.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/divexikav/asda_sausage_and_broccoli_bow_tie_pasta.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/ejercicios_de_estadistica_y_probabilidad_para_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/odometer_reset_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/39739635817.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_off0000cb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB17 5516 bytes
SHA-256: a0c5fb606cca4b8eee85705c771b5a74b239169c5a4e8fd5af2c7e3db4a8da5c
font_01_sfnt_off0000ddd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD6 10372 bytes
SHA-256: 20316ee8d5835e9e38ff9843eea82e06fbb33019458fdd0781aab5368419b7af