Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e86b3f87b0cb69b…

MALICIOUS

PDF

74.9 KB Created: 2021-03-10 03:24:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5c1a95dc0e605ec213e1bbc6e8dfd0f2 SHA-1: c2b2fb93cf6537b18249c231b613a17c9e627a8b SHA-256: 6e86b3f87b0cb69b1157e27390736a374f87205770367bdf4e2f8e40f654aea2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, with one prominent URL related to 'online schengen visa application form france' hosted on 'baarspo.ru'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple links, suggesting a campaign to distribute malicious content. Although no scripts were explicitly extracted, the nature of the embedded URLs and the phishing classification strongly suggest a malicious intent to redirect users to fraudulent websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/123?utm_term=online+schengen+visa+application+form+france PDF link annotation
    • https://cdn.sqhk.co/kagaxavog/cicsJm2/marixarexo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473419/normal_5fff6c6e28e50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484376/normal_6005f86b386a4.pdfIn PDF document text
    • http://kefijor.mygamesonline.org/kisukat.pdfIn PDF document text
    • http://fibutogu.mywebcommunity.org/human_face_3d_model_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388819/normal_5fdef283f2a6c.pdfIn PDF document text
    • http://pugorot.mygamesonline.org/percy_jackson_books_best_to_worst.pdfIn PDF document text
    • http://kiritisivasol.mywebcommunity.org/como_editar_un_archivo_srt.pdfIn PDF document text
    • https://vonuxunip.weebly.com/uploads/1/3/4/3/134377821/vazefedapifususapo.pdfIn PDF document text
    • https://tovumanaxi.weebly.com/uploads/1/3/5/3/135392352/6843297.pdfIn PDF document text
    • https://fodonisegijiwos.weebly.com/uploads/1/3/1/4/131437376/7291369.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/perodijiwiledawaxerofobo.pdfIn PDF document text
    • https://cdn.sqhk.co/vuveleni/oGJKphg/zombie_games_ps4_dead_island_2.pdfIn PDF document text
    • https://cdn.sqhk.co/navozaxezini/uWhagje/roman_adventures_britons_season_1_caches_level_5.pdfIn PDF document text
    • https://cdn.sqhk.co/jumosanex/ihcEPM7/dettol_soap_ingredients_list.pdfIn PDF document text
    • http://rubewox.sportsontheweb.net/days_with_frog_and_toad_activities.pdfIn PDF document text
    • https://cdn.sqhk.co/gebunemif/gc85hb0/president_trump_news_conference_today.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://donijexufenu.onlinewebshop.net/clothing_drop_off_bins_near_me.pdfIn PDF document text
    • http://pejaxuvotovu.rf.gd/bachna_ae_haseeno_song_pk.pdfIn PDF document text
    • http://gowejolu.rf.gd/barelasazenufofesavika.pdfIn PDF document text
    • http://gevejonitu.onlinewebshop.net/what_is_the_longest_big_nate_book.pdfIn PDF document text
    • http://kabuzore.atwebpages.com/4837016467.pdfIn PDF document text
    • http://fepebojinozid.epizy.com/bottom_navigation_view_library_in_android.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE748 5516 bytes
SHA-256: db1c9d3e41d8eaf4205dc4fac89ad7d39585419813cb8c635beedd21fa32c1df
font_01_sfnt_off0000f9ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EF 10464 bytes
SHA-256: 13a1c99b0227783398e328101bfb937655a8249b7deadd8a2237101a69e4fabe

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