Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff5fc16c752f306…

MALICIOUS

PDF

80.4 KB Created: 2021-01-27 12:43:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 341ae4007d86971319351de1951d673e SHA-1: 7ebb971c4228124ed6356ba5e40e1c5a37e23c9a SHA-256: 2ff5fc16c752f306729a085788ceddf3001e2adeded0b02c3f6fc530bd70f114
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/123?utm_term=nested+cross+validation+for+model+selection PDF link annotation
    • https://zomerasojukoluw.weebly.com/uploads/1/3/4/7/134769652/8b841.pdfIn PDF document text
    • https://cdn.sqhk.co/duditizonut/gijhzlP/3525633792.pdfIn PDF document text
    • https://cdn.sqhk.co/kizusuvut/aTlichb/scary_clown_wallpapers_hd.pdfIn PDF document text
    • https://dunexekexafu.weebly.com/uploads/1/3/4/6/134622254/putonaninadajoxe.pdfIn PDF document text
    • https://cdn.sqhk.co/surodamiz/jageghK/target_black_friday_ad_20202.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/jgdoBR6/mechanics_bank_online_registration.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/jifatha/horizon_blue_color_kia.pdfIn PDF document text
    • https://dexidexida.weebly.com/uploads/1/3/4/2/134235246/7130735.pdfIn PDF document text
    • https://wimupajano.weebly.com/uploads/1/3/4/6/134682998/7358869.pdfIn PDF document text
    • https://cdn.sqhk.co/pexejaxer/pnjjhjf/mexican_football_league_2_table.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/ghii6ib/cordial_definition_wikipedia.pdfIn PDF document text
    • https://jisetufazuv.weebly.com/uploads/1/3/5/3/135307323/zozotikibulomum_makezijutarib_kewoluzolopubed.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/nezanurugega/bet9ja_new_mobile_app_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/23611706844.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/suwir.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_off0000fc85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC85 5196 bytes
SHA-256: 202de80f00e0f08af68fa64d1d7e9f658eaa78daeb1688a5d5c8d313723ae386
font_01_sfnt_off00010e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E28 11232 bytes
SHA-256: b2e67663bab63d76bb1e557dd6e28ca3508e89c3a7b324e41fd5c35cdef67945