Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a2ec8e454423df…

MALICIOUS

PDF

103.8 KB Created: 2021-04-25 00:31:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b3d1867611a0628bc769989ec46d9598 SHA-1: 55444de3a512c1c207397981823f7f46236089c8 SHA-256: e9a2ec8e454423dfb555f0a303161ff05fcc5d108206fb5a494aca3e763364ba
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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://soxebez.ru/strik?utm_term=euripides+medea+themes PDF link annotation
    • http://tpdreport.com/42839327677aq1t0.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/ijclYic/easy_cake_recipe_at_home_in_cooker.pdfIn PDF document text
    • https://niromegezos.weebly.com/uploads/1/3/2/6/132681660/37287bbde56e79.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://cdn.sqhk.co/duravukikemo/egh4gjq/dc_comics_characters_harley_quinn.pdfIn PDF document text
    • https://nikizatul.weebly.com/uploads/1/3/5/3/135309179/zowosalavulop.pdfIn PDF document text
    • http://imkl-checker.com/29366812441z6ugw.pdfIn PDF document text
    • http://moscowflowers.online/chick_fil_a_starting_wage_20198laje.pdfIn PDF document text
    • http://prizinsta24.site/ubuntu_font_for_androidlonyw.pdfIn PDF document text
    • https://cdn.sqhk.co/fivodewile/h8lLJic/nancy_nails_and_spa_braintree_ma.pdfIn PDF document text
    • http://pet-guru.shop/does_tp_link_smart_plug_work_with_alexa145oh.pdfIn PDF document text
    • http://palejep.22web.org/auschwitz_book.pdfIn PDF document text
    • http://heartcenteredequestrian.com/biduzonodvoy4.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/kebibizovutyav1b.pdfIn PDF document text
    • https://cdn.sqhk.co/sadetujadufi/7Jg2Fon/change_text_color_taskbar_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/kewebogi/fjgLhhF/ravens_depth_chart_2020.pdfIn PDF document text
    • https://gebiworopefibo.weebly.com/uploads/1/3/4/5/134583098/77356354e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/what_is_the_second_highest_rank_in_boy_scouts.pdfIn PDF document text
    • http://temoweboriti.rf.gd/zusuxuxotarif.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/what_is_the_best_e_reader_to_buy_in_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/gopifu/informational_poster_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/badger_insinkerator_1_3_hp_troubleshooting.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_off00013cb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CB9 7056 bytes
SHA-256: 497937ff73300016bfd2a19b99fa8c73495d506f1d11ac818908c83627ac582b
font_01_sfnt_off0001546a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1546A 5124 bytes
SHA-256: 3744a16811420bd059d998390d00bdb08e025ab721678b165faf0573514736c2
font_02_sfnt_off000165a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165A5 13156 bytes
SHA-256: 1cdbef66bf485271ef589734ae734c340cb47bad87167341dde207d9d380c272

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