Malicious PDF — malware analysis report

Static analysis result for SHA-256 90445f2e06d61de1…

MALICIOUS

PDF

72.1 KB Created: 2021-02-28 16:02:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d48b57570b59d19c7a5aff6f66cbcbe7 SHA-1: 8aa1f5f3aae45700a68a6e3cab6ab5140d53d8cb SHA-256: 90445f2e06d61de1326f44120fe6a4dd7fe896cd8c89918c91bba2c8efcfc585
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/award?keyword=solid+wood+student+desk PDF link annotation
    • https://jimutovila.weebly.com/uploads/1/3/1/8/131856698/defosinesagew.pdfIn PDF document text
    • https://xexidizufom.weebly.com/uploads/1/3/4/5/134508107/nuxegaxuvami-nidusigibiloz-ponixipujenalo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475992/normal_60312d3f1fdfb.pdfIn PDF document text
    • http://world-wild-shop.com/75871717578g64bk.pdfIn PDF document text
    • https://vonepegoparopew.weebly.com/uploads/1/3/4/3/134352316/f148d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386095/normal_602e3a698b425.pdfIn PDF document text
    • https://rakiletapaleta.weebly.com/uploads/1/3/1/8/131856645/498706.pdfIn PDF document text
    • http://alphabitx.com/21919663405uje3s.pdfIn PDF document text
    • https://wubedekajonew.weebly.com/uploads/1/3/1/3/131380741/sodezujupabo.pdfIn PDF document text
    • http://bettermoneytips.com/dungeon_crafter_downloadrrgcb.pdfIn PDF document text
    • http://lnstagramcentre.net/9798955730418o17.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/sat_practice_test_7_answer_sheet.pdfIn PDF document text
    • https://dagakaxogofawi.weebly.com/uploads/1/3/4/6/134699425/5395944.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dusubonifu/hyderabad_traffic_e_challan_app.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/kindergarten_letter_tracing.pdfIn PDF document text
    • http://lijowavatajo.myartsonline.com/golds_gym_xrs_50_home_gym_with_high_and_low_pulley_system_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/60794160377.pdfIn PDF document text
    • http://sipanokule.onlinewebshop.net/47717052043.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/dreams_nepali_movie_full.pdfIn PDF document text
    • http://kulebosux.myartsonline.com/zojumesojizukofib.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/appdynamics_dotnet_agent.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD081 4656 bytes
SHA-256: 15310b3a7df33d8389a6bc3c47160ad8f76054617a0ee62a4744a868567bfcf3
font_01_sfnt_off0000e076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE076 10368 bytes
SHA-256: 91f5099941c0c2c0756262321b51c17ab058c71791f8dad49f307f0e5931cfbd
font_02_sfnt_off00010382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10382 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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