Malicious PDF — malware analysis report

Static analysis result for SHA-256 a37f3954ee647728…

MALICIOUS

PDF

73.0 KB Created: 2021-03-03 02:13:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2424cfe17d13d5622883073f35e819e1 SHA-1: f9f45a6852a03dcc59ddc2c2d0e449b680e10b7b SHA-256: a37f3954ee647728261e6ef3c954f0f1cce44e9249f6d02da78b1ed2abd5e406
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://xajibur.ru/award?keyword=business+close+down+due+to+covid-19 PDF link annotation
    • http://vugekowuzujed.scienceontheweb.net/how_much_weight_will_i_lose_with_gastric_sleeve_calculator.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/3kyPiep/microsoft_planner_in_teams_ppt.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/cheapest_place_to_buy_one_touch_ultra_test_strips.pdfIn PDF document text
    • https://tomoniwibisuxis.weebly.com/uploads/1/3/5/9/135961627/sejeburidili.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/hhj2cgc/75915607855.pdfIn PDF document text
    • https://vexokisu.weebly.com/uploads/1/3/4/7/134717498/0e39b6ab0c0.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/heficGL/wupozel.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/nedikikubuxuwuvarifejuwub.pdfIn PDF document text
    • https://kikoxelila.weebly.com/uploads/1/3/4/3/134335894/2600485.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/folexapurilowe/68289836667.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/algemene_formule_alkanen_en_alkenen.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/canon_powershot_g7x_mark_ii_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/99785164271.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/94049584441.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/identity_theft_report_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/gifaporanof.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/calories_in_a_small_wendys_chili_with_cheese.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/betterley_report_cyber.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_off0000e27a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27A 5068 bytes
SHA-256: 4ef0e5911afa815a32b4b301c7bbc3c705a187afcce82b97844d0664b1ade416
font_01_sfnt_off0000f3f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F4 10228 bytes
SHA-256: 95ed0e2e56a7ae37c4c188dbbd362c8f7591bc58ab19f75f9290522a0c70c02a

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