Malicious PDF — malware analysis report

Static analysis result for SHA-256 c97fe9cd4628c88e…

MALICIOUS

PDF

65.0 KB Created: 2021-01-31 12:38:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d67db81bae0e9c17d2d066b026482b05 SHA-1: d54123088ef1f8f4d567ddcf6a272e66faf92b20 SHA-256: c97fe9cd4628c88e5c59fd73a74217b9f8b046e3de95374bbea8f4532f12a2ad
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://bologen.ru/aws?utm_term=aqa+gcse+history+elizabethan+england+revision+guide PDF link annotation
    • https://cdn.sqhk.co/sadirorig/vgifngf/minecraft_servers_survival_1._16._1.pdfIn PDF document text
    • https://cdn.sqhk.co/dadakafopina/RGfi3ER/sobewulakakovos.pdfIn PDF document text
    • https://nosuzodudoj.weebly.com/uploads/1/3/4/5/134588086/vatip_gaken_gowazikinon_wotewonajojox.pdfIn PDF document text
    • https://gepadagonuvo.weebly.com/uploads/1/3/0/7/130775626/wujunibufujitub.pdfIn PDF document text
    • https://mobefoba.weebly.com/uploads/1/3/0/7/130776725/lowideguses.pdfIn PDF document text
    • https://tuzafezinaxav.weebly.com/uploads/1/3/4/3/134319976/7452939.pdfIn PDF document text
    • https://wubepifumemav.weebly.com/uploads/1/3/4/1/134109226/411766.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/igaRohf/rofejisebaka.pdfIn PDF document text
    • https://kidubaviputotej.weebly.com/uploads/1/3/4/5/134520398/7461557.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/wonumafubij/51217669357.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/new_bollywood_award_shows.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/anz_kiwisaver_login_oneanswer.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/revit_architecture_101.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/81362927543.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/ton_b_album_nh_trn_facebook.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_off0000bfbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFBF 5668 bytes
SHA-256: cc2da3377fe36487063bd71281047d5e09046a4043f916b14c20fe23937fa95e
font_01_sfnt_off0000d30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30B 10520 bytes
SHA-256: 4e48add640eefd3e86071d7324fc2d0cf0dcbf75ac76989c4ee70a7dad724a4d