Malicious PDF — malware analysis report

Static analysis result for SHA-256 751e7317c4eef158…

MALICIOUS

PDF

80.3 KB Created: 2021-04-01 23:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eba0c7220b4deea84afcee39aca3d143 SHA-1: 18eae3df8d7911c94d22452477a6a699841f2de9 SHA-256: 751e7317c4eef1587bb6796d0e2e1811531c192230713efa32ab732fbe9968bf
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, 'fokemale.ru', which is likely used for phishing or to host malicious content. The document body, though heavily obfuscated, suggests a lure related to shoe sizing. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high probability of malicious intent. No scripts were extracted, but the presence of external URIs and the nature of the heuristics suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://fokemale.ru/123?utm_term=guide+taille+chaussure+kickers
    • http://fanutoragozogow.sportsontheweb.net/delaki.pdf
    • https://disemorabegelam.weebly.com/uploads/1/3/1/3/131383982/7171553.pdf
    • http://fawikenaxalu.scienceontheweb.net/bodybuilding_food_nutrition_chart.pdf
    • http://gazozasi.scienceontheweb.net/print_booklet_from_indesign.pdf
    • http://poxumanavofeboz.scienceontheweb.net/how_to_find_vertical_asymptotes_of_a_trig_function.pdf
    • https://cdn-cms.f-static.net/uploads/4490528/normal_605ffc5b22c85.pdf
    • https://zoparimunafixi.weebly.com/uploads/1/3/4/3/134336740/rekodoj.pdf
    • https://bowineno.weebly.com/uploads/1/3/4/8/134868267/1608154.pdf
    • http://buwovavozu.getenjoyment.net/wayside_school_books.pdf
    • https://jurujixomegisi.weebly.com/uploads/1/3/4/7/134745805/figaron_lebajur.pdf
    • http://fibipowokogo.sportsontheweb.net/kobusuzixuvofapovelimef.pdf
    • https://static.s123-cdn-static.com/uploads/4446647/normal_5ff50bca33e50.pdf
    • http://gozimudowojuzun.mypressonline.com/center_periphery_relations_a_key_to_turkish_politics.pdf
    • https://cdn-cms.f-static.net/uploads/4416927/normal_5fdb99550f848.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sobaketemu/gallery_bootstrap_free_templates.pdf
    • https://uploads.strikinglycdn.com/files/e788ac83-3c92-4383-bbb3-bd217c091ae1/vitamix_5200_blender_professional-grade_best_high-end_pick.pdf
    • https://s3.amazonaws.com/tevomenil/cards_against_humanity_online_game_pretend_youre_xyzzy.pdf
    • http://kegigija.atwebpages.com/modern_business_administration_6th_edition.pdf
    • https://s3.amazonaws.com/jezobasit/zotubituma.pdf
    • https://uploads.strikinglycdn.com/files/da1c32fb-b723-4849-bfdf-e997d00fd567/t_fal_optigrill_switches_to_manual_mode.pdf
    • http://lowuguja.myartsonline.com/nitracion_de_acetanilida.pdf
    • https://s3.amazonaws.com/verirejon/the_animator_s_survival_kit_book.pdf
    • https://s3.amazonaws.com/norozovijalu/16411872790.pdf
    • https://uploads.strikinglycdn.com/files/4cbd216c-5a8d-48c6-8b1f-4aa94f88c1e0/surudidosude.pdf
    • https://uploads.strikinglycdn.com/files/7b420aca-d81b-43ac-876a-71fed0467552/xefukepetaletewedi.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9ae.bin
755f7db58bfe3da56c4b7a82999b06149cd984ffdcbf45d0e292191b96cf5989		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AE 5124 bytes
font_01_sfnt_off00010b10.bin
58e55b8c98d9a011364d4b066f2f6bf78ef4f39c32d3f1e18746ac3688f906ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B10 12464 bytes

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