Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb0e79c9db59ca3c…

MALICIOUS

PDF

81.8 KB Created: 2021-04-03 05:31:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13322f27927e6fef45761d3835bb8e35 SHA-1: 7ef6d7f2ffddadba2de09ab93a48c6fad1397a1c SHA-256: eb0e79c9db59ca3c2aba5d49206e135371f69fb85654f5621ab7712c2a7e56af
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/123?utm_term=free+bollywood+music+video+s+mp4'. This indicates the document's primary purpose is to redirect users to malicious infrastructure, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/123?utm_term=free+bollywood+music+video+s+mp4
    • https://static.s123-cdn-static.com/uploads/4449622/normal_5feb665ccad45.pdf
    • http://rijunoje.mygamesonline.org/kuzenudutezenirafov.pdf
    • http://danoguvu.medianewsonline.com/asme_b31_1_espaol.pdf
    • http://guzolemidova.iblogger.org/zumido.pdf
    • https://cdn-cms.f-static.net/uploads/4482418/normal_6015cd8095a26.pdf
    • http://josumewemuzob.getenjoyment.net/resojowivotag.pdf
    • https://cdn.sqhk.co/gevanadu/fgeCOib/hamster_life_game_mod.pdf
    • https://cdn.sqhk.co/tumowara/IjdcNia/53626603400.pdf
    • http://zusozujowumid.iblogger.org/gurefadinem.pdf
    • https://cdn-cms.f-static.net/uploads/4469850/normal_6037d5e0d5fa4.pdf
    • https://cdn.sqhk.co/velabolo/cjew130/guncrafter_industries_cz.pdf
    • https://static.s123-cdn-static.com/uploads/4367631/normal_5ff6a4c92eb6f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lanubili/tomovumeraji.pdf
    • https://s3.amazonaws.com/kigavanus/47290125686.pdf
    • https://s3.amazonaws.com/xoxaneral/roranomidapevoju.pdf
    • https://s3.amazonaws.com/rodiligarexo/25540901083.pdf
    • http://kopolug.myartsonline.com/brand_identity_book.pdf
    • https://s3.amazonaws.com/sazariwapa/formula_para_volumen_de_un_prisma_pentagonal.pdf
    • http://lisuxuzilim.epizy.com/roald_dahl_fantastic_mr_fox_worksheets.pdf
    • https://s3.amazonaws.com/vinejivunitego/manual_para_aprender_ingles_gratis.pdf
    • https://s3.amazonaws.com/zozofufulolig/androidx_appcompatactivity_lifecycleowner.pdf
    • http://sewasijibakel.epizy.com/rixaz.pdf
    • https://s3.amazonaws.com/wusone/the_art_of_the_deal_book_summary.pdf
    • http://dezobod.onlinewebshop.net/morabexavidizowo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecd7.bin
e6e0957d36ac4e59c9d4088c7c8c7bc4a47461e7caf5f5833c7e6363fd867e2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECD7 5448 bytes
font_01_sfnt_off0000ff6c.bin
99d607dfb33218b09d41b627df254f4c790cb2100d5c082013da799d07b9913b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6C 11276 bytes
font_02_sfnt_off00012500.bin
354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12500 16036 bytes

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