Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab15c6c8701cfdda…

MALICIOUS

PDF

79.1 KB Created: 2021-05-14 15:42:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5b603d89b3a444662b612659adc5462 SHA-1: 7873b13d97a2b8a68121ac497e057f6ff8d2ba96 SHA-256: ab15c6c8701cfdda9081986dc4cb2ff71dc3cde50c714715f31e7c03a8b67230
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'kuzutuzo.ru' suggests an attempt to redirect the user to a malicious site or download a payload. The heuristic 'SE_DOWNLOAD_BUTTON' further supports the idea that the document is designed as a lure to trick users into downloading content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kuzutuzo.ru/strik?utm_term=do+you+have+to+be+good+at+math+to+study+business
    • http://finofoze.22web.org/xifizumuxupo.pdf
    • http://pokavitapizinuv.iblogger.org/windows_multipoint_server_2016_licensing_guide.pdf
    • https://cdn-cms.f-static.net/uploads/4487197/normal_603a1b5e7d0d6.pdf
    • http://tifezal.iblogger.org/25547473846.pdf
    • http://ziguzuxudatigu.22web.org/clinical_nutrition_free_download.pdf
    • http://vasamekekegu.iblogger.org/admin_template_php_mysql.pdf
    • https://cdn-cms.f-static.net/uploads/4457011/normal_6057a9296ac3b.pdf
    • https://cdn-cms.f-static.net/uploads/4390055/normal_60463658ca397.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/savifin/valkyrie_profile_android_review.pdf
    • https://uploads.strikinglycdn.com/files/21b499cd-d106-4ecd-9a88-20960a060de7/tagilupemumovunuxikusori.pdf
    • https://uploads.strikinglycdn.com/files/db3388f4-68a2-47e3-bf09-1dbff95da352/fe_1_exam_pass_rate.pdf
    • https://uploads.strikinglycdn.com/files/ed122325-ce20-46c0-a270-b2da3b259709/best_video_games_to_play_with_friends_2020.pdf
    • https://uploads.strikinglycdn.com/files/bac62097-3be8-4f31-98dd-0c3ab042acfd/dell_optiplex_790_specs_sff.pdf
    • https://s3.amazonaws.com/wunupalezozerud/vutixebubutijexevo.pdf
    • https://uploads.strikinglycdn.com/files/e9f835bd-a452-49fd-82d4-eabe0bacda3b/new_game_show_2021_the_chase.pdf
    • http://jinixoxugud.rf.gd/translate_portuguese_to_english_free.pdf
    • https://s3.amazonaws.com/fuwenoxuzasila/mesutirutakimuseti.pdf
    • https://s3.amazonaws.com/kabisebax/poe_ed_contagion_guide.pdf
    • http://nunozufivov.epizy.com/leretuliwokewed.pdf
    • https://uploads.strikinglycdn.com/files/ac63efc2-a788-4213-a22a-49be3ede6e96/67901135877.pdf
    • http://xikoxevogajub.epizy.com/galactic_core_live_wallpaper_full_apk.pdf
    • http://laxuraxosolun.epizy.com/bewurutofuzabizapa.pdf
    • https://uploads.strikinglycdn.com/files/72f6ce6d-e281-42b8-96b6-8527746a358c/54434840769.pdf
    • http://rapudipawuv.epizy.com/biology_practical_book_class_11_ncert.pdf
    • https://uploads.strikinglycdn.com/files/34613072-533f-436f-9613-e7338f955b9f/juxaxazinumezawupoguko.pdf
    • https://s3.amazonaws.com/fizufapu/15635917392.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_off0000f6c6.bin
117df8cc1499f7eaf93b002608d6ca2ce6f5883f86ac4c166d321d64c922eb07		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C6 5412 bytes
font_01_sfnt_off0001091b.bin
dbf8a6bf3c78f1fcb18100ba64fa38b3c60defa3e3cb1980ab001fac8f61a96a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1091B 11028 bytes

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