Malicious PDF — malware analysis report

Static analysis result for SHA-256 a714e86b27087d35…

MALICIOUS

PDF

80.6 KB Created: 2021-03-02 02:27:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 1c670b72f0546ccd4dee480af5594897 SHA-1: 30a0752e1599ebcd664d3317aeaab38598d27110 SHA-256: a714e86b27087d354a78d5c1f8f99caf5d3cef833598a5da8efd8b657989fb3e
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious content. It contains numerous embedded URLs, many of which point to disposable domains, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a search query for 'justice league animated episodes online', likely serving as a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=justice+league+animated+episodes+online PDF link annotation
    • http://microbladingcertificationdfw.org/lazasuwemanikumical50.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/jg2GTgg/easy_load_trailers.pdfIn PDF document text
    • http://milanbeach.fun/new_aaa_games_androidejb98.pdfIn PDF document text
    • http://pidawudimo.scienceontheweb.net/81325416895.pdfIn PDF document text
    • http://crispyset.online/fall_guys_game_tier_listigc65.pdfIn PDF document text
    • http://forpost-electrica.ru/822069204434nd0y.pdfIn PDF document text
    • http://1offpark.xyz/android_game_development_javascriptlibq7.pdfIn PDF document text
    • http://mufezupep.iblogger.org/dish_network_bundles_with_internet.pdfIn PDF document text
    • http://faxusupovetek.sportsontheweb.net/oracle_sql_multiple_rows_to_comma_separated_column.pdfIn PDF document text
    • http://triple-doska6.club/tefajugomaronomuxekinoz0ezhe.pdfIn PDF document text
    • http://wexixexebasober.22web.org/mikotaz.pdfIn PDF document text
    • http://jibakerutev.mypressonline.com/define_direct_rule_system.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/maths_formulas_for_class_6_to_10_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/1174921549.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/39657704204.pdfIn PDF document text
    • http://bujubigakokuv.epizy.com/punjabi_couple_pics_full_hd.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_off000100c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C3 5288 bytes
SHA-256: d5d4e9ffb25d22f9e555989e3fa657619c1954df09d400389e6281018769c9a4
font_01_sfnt_off000112af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112AF 10196 bytes
SHA-256: ced67904b85ccebcaf666bb543870d1fe77fa50c82544609075a18727e3df3e5

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