Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f8d0016641498a3…

MALICIOUS

PDF

82.8 KB Created: 2021-05-10 15:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb11132976e64fd74f9fe4e1df6fe1ba SHA-1: bbfbe139eea3351be769d78fc6853d9b5f5939a7 SHA-256: 5f8d0016641498a37e5bb1ee42ed2275520c39e66a0c3d11b3f38658dce529d4
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that leads to a URL associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=how+to+apply+for+medicaid+number
    • http://logoped-samara.ru/66530813049hqnt2.pdf
    • http://probkin34.xyz/transformers_autobot_stronghold_2_hackedrou47.pdf
    • https://static.s123-cdn-static.com/uploads/4456686/normal_60069b52d98e3.pdf
    • http://daisywobzr.rest/gibawupugepili0v55d.pdf
    • http://cocobeautybar.ca/59123701975lrsax.pdf
    • http://triple-doska1.club/milton_maize_maze_2020by565.pdf
    • https://cdn-cms.f-static.net/uploads/4384464/normal_600e05c1a9d42.pdf
    • https://cdn.sqhk.co/pevelefotuve/9iigjie/hachiko_japanese_movie_trailer.pdf
    • https://cdn-cms.f-static.net/uploads/4385880/normal_602711e36347f.pdf
    • https://cdn.sqhk.co/nufesewepi/oRge8ij/kaiju_rush_all_eggs.pdf
    • https://cdn-cms.f-static.net/uploads/4378393/normal_604422936e91f.pdf
    • https://cdn-cms.f-static.net/uploads/4475741/normal_605a2290d927d.pdf
    • https://cdn.sqhk.co/nepozenilu/hxiuFy2/aifmd_annex_iv_reporting.pdf
    • https://cdn.sqhk.co/vulovosovem/hdjbtje/77271966644.pdf
    • http://runmasten.online/mudisuxeku40kj0.pdf
    • http://svarka-aurora.online/remember_me_from_coco_sheet_musicyzn5r.pdf
    • https://cdn.sqhk.co/ledivure/hf1ihmt/facebook_search_bar_missing_2020.pdf
    • http://heymama.store/catalogue_ikea_maroc_2020ghlfg.pdf
    • http://yazansoft.com/codecombat_answers_backwoods_forestpktgv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8282f21d-6318-427e-a521-18ec49e3791d/how_do_you_fix_a_motion_sensor_light.pdf
    • https://uploads.strikinglycdn.com/files/43633fa1-f488-4997-9fd9-f71292cfa212/85801097148.pdf
    • https://uploads.strikinglycdn.com/files/fa665433-9ad8-4141-ae5a-6ad4a65cbbdc/personal_narrative_essay_examples_5th_grade.pdf
    • https://uploads.strikinglycdn.com/files/b0aab056-ece2-4a64-aaf1-618476aa0a9f/jibejumobagug.pdf
    • https://uploads.strikinglycdn.com/files/82a522a1-f251-4811-b35f-01488e7cbe1f/how_much_weight_can_you_lose_on_800_calorie_diet.pdf
    • https://uploads.strikinglycdn.com/files/7d42aefa-9497-414f-9c14-761ba59d0da5/dd_handbook_free.pdf
    • https://uploads.strikinglycdn.com/files/21b53b0e-0c03-41fa-b7eb-6c024e2e976d/how_can_i_make_a_smoothie_without_yogurt.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_off00010679.bin
adc4c5de89798631cd8d7e55c883ebc960b0aede94fea95f3b7a1a31b7b33755		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10679 5416 bytes
font_01_sfnt_off000118e7.bin
0afe26dc0a9a1fee39c5be017640c42ce3adb01dc8f998d65f0d331d38d46da2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118E7 10796 bytes

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