Malicious PDF — malware analysis report

Static analysis result for SHA-256 f818d34f375755fb…

MALICIOUS

PDF

93.7 KB Created: 2021-03-19 13:36:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 99e5d6fbd57f5c54f5161443bad3bc6a SHA-1: 211a03403dbeacce765582c470be62eec4d8c632 SHA-256: f818d34f375755fba7a52e1646e49f22f99c0391ce4d770d33a288a41703d220
76 Risk Score

Malware Insights

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

The sample is a PDF document flagged by a machine learning classifier as malicious. A high-confidence heuristic indicates a payment redirection lure, suggesting the document aims to trick users into updating financial details or making fraudulent payments. The embedded URL points to a suspicious domain, likely serving as a landing page for the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://vilenefex.ru/strik?utm_term=principles+of+heat+and+mass+transfer+solution+manual+pdf PDF link annotation
    • http://duzixofiwisegi.mygamesonline.org/the_game_of_life_instruction_booklet.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/wFbehii/97118145169.pdfIn PDF document text
    • https://cdn.sqhk.co/jomawutid/8jgnhcZ/dekedaxogip.pdfIn PDF document text
    • https://cdn.sqhk.co/rekubapapup/bidEkgh/66999341837.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/bise_sukkur_hsc_part_2_result_2020.pdfIn PDF document text
    • http://danoguvokapijof.medianewsonline.com/brazing_vs_welding_vs_soldering.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/dapazegeviranigawowizosik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9b73711-a827-4e0b-af17-6eff1e7e45c5/83130896909.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5de9f158-5667-40aa-a71a-28133cc1e1d9/survival_movies_on_netflix_and_hulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a627b33d-174d-400c-b7d1-c80144055396/kajapimadizubodowamuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/072e4656-6359-4fdb-a2bd-885bb5afddac/what_is_computational_thinking_class_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ada8d61-497d-4b92-acb9-ca5517f32b88/16664625525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ba2b786-a533-42d7-9b3c-e10d22d0320f/is_the_after_book_series_good.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77aaf7d3-a389-46eb-b5c2-a28fd0e2765b/xozakagez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09c65763-a5eb-4b4c-be1a-f1751da4f2a7/para_que_sirve_el_zinc_elemental_50_mg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfb47781-99c9-4936-81cd-73a38d7161e8/how_to_restore_dish_tv_set_top_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5059cecb-72bc-4609-b46c-664653dd0c35/puraninununujemi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001284e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1284E 2828 bytes
SHA-256: dd7b880f1c6958317b71933e3175eb4154b1281d355b69180e4ce829e506ee21
font_01_sfnt_off00013248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13248 5396 bytes
SHA-256: a72ec7a9c1560716b7de4383aa99f554dbc60014aefcabeb22087e34842eee4a
font_02_sfnt_off00014477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14477 10016 bytes
SHA-256: 82e04059ee3bcbe254dfacbe03f28fc96aae583bc91013eb24d3dc8877b57fb6

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