Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd6ef86898b09a0d…

MALICIOUS

PDF

107.3 KB Created: 2021-04-01 22:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9dc3eef64908a634096c2eb3861a8278 SHA-1: 54a90b98a71ed622374c22d2612bdc733108f0a6 SHA-256: dd6ef86898b09a0d04869b5fea48bb96bee79454f453ed64cf423947d18fa823
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dugedepap.ru/123?utm_term=what+is+anaphylactic+shock+pdf PDF link annotation
    • http://kaxiwemusemoj.mypressonline.com/fraction_bars_worksheets_3rd_grade.pdfIn PDF document text
    • http://kuvezowepo.scienceontheweb.net/charles_darwins_origin_of_species.pdfIn PDF document text
    • http://bottlechainworld.com/used_harman_p61_pellet_stove_for_saleah31z.pdfIn PDF document text
    • http://smartline58.ru/596193255498cjgt.pdfIn PDF document text
    • http://digitalcalakk1.xyz/jyotish_astrologia_vedica9c8en.pdfIn PDF document text
    • http://theraisins.pro/wakobg6ebr.pdfIn PDF document text
    • http://fashion-deals.xyz/belivufodokhxlm.pdfIn PDF document text
    • http://fb-pageunderreview.com/birthday_cards_for_best_friend_freez7ysj.pdfIn PDF document text
    • http://pubggaming.online/disney_beauty_and_the_beast_book_pursevndxr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_19370ecf758b4c1cbc40850f66fe1817.pdf?index=trueIn PDF document text
    • https://78636f1b-f2d6-4e4a-b4e1-07eac4c165d1.filesusr.com/ugd/434c97_d9a8b4840fe04c96b35c8941668bc5da.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/waxusevedorirow.pdfIn PDF document text
    • http://sorisavitekinuj.onlinewebshop.net/subazixusenejezazimadakeg.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/21229646873.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/65630256126.pdfIn PDF document text
    • https://305aa2e3-e1d2-413d-aa2e-f1bb83d03ded.filesusr.com/ugd/92ee2b_c3ce72ee669442829b4a1efe5d3010c7.pdf?index=trueIn PDF document text
    • https://f85e9a30-dbb9-40fd-a66d-53bd7daafe07.filesusr.com/ugd/1b9faa_f72ceef2c0a24cb9b540130b333cac8d.pdf?index=trueIn PDF document text
    • http://vigavanoxe.onlinewebshop.net/nirelurak.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/59482769628.pdfIn PDF document text
    • https://f6ce3cfb-f922-470c-9e0e-eaf724001b0e.filesusr.com/ugd/defcb2_31efeed853924987a38d3ab61a857deb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/42041754580.pdfIn PDF document text
    • http://pajupevezujugut.atwebpages.com/auditoria_financeira_exercicios_resolvidos.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/nibofufoxawebaseket.pdfIn PDF document text
    • http://dogiwexor.myartsonline.com/geography_landforms_worksheet.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_off0001608e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1608E 5328 bytes
SHA-256: 2c419e675fa2096acd5a60d2016b0fdc896d8c6ee14e1683a59dba319406d17a
font_01_sfnt_off000172c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172C5 13508 bytes
SHA-256: b223add77afe900bc8679442f397b794a3537029b0f872bc95c0571f7726eebc

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