Malicious PDF — malware analysis report

Static analysis result for SHA-256 618ab27916ad54b4…

MALICIOUS

PDF

74.4 KB Created: 2021-03-19 08:43:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 4848d707cc8d365c0edd280889bdc64e SHA-1: 8665fc858e5bc7567bd868ec2251ad30c6c0781a SHA-256: 618ab27916ad54b4534d9a52245738d9739125a9a027074b49c747b95b434263
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to a 'Troy bilt super bronco mower drive belt diagram', likely to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/strik?utm_term=troy+bilt+super+bronco+mower+drive+belt+diagram PDF link annotation
    • http://liwadaxezaf.getenjoyment.net/jelotenavojebazifakug.pdfIn PDF document text
    • https://cdn.sqhk.co/pijajawopoji/e9ggjjQ/39379691943.pdfIn PDF document text
    • http://bexemusu.mypressonline.com/printing_press_company_profile.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/echo_weed_eater_parts_list.pdfIn PDF document text
    • http://rodisawikikofu.medianewsonline.com/accounting_interview_questions_and_answers_in_bangladesh.pdfIn PDF document text
    • http://ladunosim.sportsontheweb.net/what_foods_are_good_for_alkaline_diet.pdfIn PDF document text
    • https://cdn.sqhk.co/xafukapewe/iisfbQe/resident_evil_animated_movies_canon.pdfIn PDF document text
    • http://kumajamefe.getenjoyment.net/nopujelamebalupev.pdfIn PDF document text
    • https://cdn.sqhk.co/nukusigemug/ifJrvji/download_jungle_adventure_games_for_pc.pdfIn PDF document text
    • http://labifovejes.mypressonline.com/reddit_pokemon_go_trade_codes.pdfIn PDF document text
    • http://zokugorevat.mywebcommunity.org/is_myofascial_release_covered_by_insurance.pdfIn PDF document text
    • http://rozogididibusar.sportsontheweb.net/casio_ctk_2400_price_in_sri_lanka.pdfIn PDF document text
    • http://posiximuteg.sportsontheweb.net/togefufoletoxatat.pdfIn PDF document text
    • http://tilikef.mygamesonline.org/62448954697.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/hiichiB/42844771569.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pedirite.onlinewebshop.net/new_balance_sheet_format_download.pdfIn PDF document text
    • http://fadezanunadafik.myartsonline.com/jojagezubuxijobomibumufo.pdfIn PDF document text
    • http://kibiviridox.epizy.com/xuluximewakixomefomu.pdfIn PDF document text
    • http://fepadegan.epizy.com/anari_song_ringtone.pdfIn PDF document text
    • http://vawerudarasikow.myartsonline.com/bk_shivani_quotes.pdfIn PDF document text
    • http://zodofujeki.atwebpages.com/merge_split_files_free_download.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_off0000e6b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B7 5736 bytes
SHA-256: e4c8d9d21a477d634f7945a4b5f4edf18415f8af9c1e198f01ad14c939aaed38
font_01_sfnt_off0000fa44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA44 9956 bytes
SHA-256: 1632ec0a684d8541d2d5bfe16974f8276d2d59eecd65dc0e3834e6a82b4be417

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