Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb50266d3096906…

MALICIOUS

PDF

70.5 KB Created: 2021-02-12 07:31:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2a98157c4f8ce5e4fcb5a19987d8033a SHA-1: e743fe729870d5c0e7d47cd757776fbe33c0151a SHA-256: adb50266d3096906a5965a4019610c2db701eb9d98378e0da475349ecd6505a5
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/wix?keyword=download+regular+show+best+park+in+the+universe+apk PDF link annotation
    • http://nat-fru.space/rukoxexigejajefepoxofabbktgf.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/Xjc2Oib/download_clan_tribe_war_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412380/normal_60001b804fcb3.pdfIn PDF document text
    • https://cdn.sqhk.co/leluforeref/jfGjjw5/67228425000.pdfIn PDF document text
    • https://kutemipemowu.weebly.com/uploads/1/3/4/8/134860595/tukamajuvesunoma.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/eZnhFOS/resorukovugazulovuzivovef.pdfIn PDF document text
    • https://fagutefoxod.weebly.com/uploads/1/3/4/2/134235025/02e0d46ae4da41.pdfIn PDF document text
    • http://pubguckazan.com/album_remix_song_mp4xkqrh.pdfIn PDF document text
    • http://pasendapp.online/upsc_2016_answer_key_paper_1hupwh.pdfIn PDF document text
    • https://gixoxiri.weebly.com/uploads/1/3/4/7/134707295/01d179e5c012b7a.pdfIn PDF document text
    • https://wofalexo.weebly.com/uploads/1/3/4/6/134697980/87440d2f12a4ad9.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/kiwopusafize/ambala_cantt_current_weather_report_today.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/akata_agbada_and_benin_formation.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/langrisser_mobile_soldier_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/algorithm_c.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_off0000d630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD630 5576 bytes
SHA-256: a22fb632eba24e90420c879a9d4b06fde7084a5e60863b7e8a22e7045a9a2eb6
font_01_sfnt_off0000e934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE934 10412 bytes
SHA-256: 056514c09a177dd9b6d0a906f64260831d16bfb8a1c280600831a5f4fff83a45