Malicious PDF — malware analysis report

Static analysis result for SHA-256 485204a2a15fa39b…

MALICIOUS

PDF

76.4 KB Created: 2021-03-05 13:00:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b19f4c674e619c86bedaa6cd4c142328 SHA-1: 942a35eaa612fb2c3f393457c11498bf057ed92c SHA-256: 485204a2a15fa39bccdafd7116171ca5b2d349c700f7910160981f2cb3ee8982
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic and the large number of embedded URLs suggest a link farm designed to redirect users to potentially malicious sites. While no scripts were explicitly extracted, the presence of numerous external URIs points towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/wix?keyword=bosch+4100+table+saw+parts PDF link annotation
    • http://rejasepilibuxep.iblogger.org/how_many_calories_in_powerade_active_water.pdfIn PDF document text
    • https://cdn.sqhk.co/vumusokutil/jfbijjr/helicopter_robot_game_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jumupebuvi/igIjayM/vakanejala.pdfIn PDF document text
    • https://cdn.sqhk.co/pirasemofoge/2gel1jh/valentines_edible_cake_decorations_michaels.pdfIn PDF document text
    • https://cdn.sqhk.co/wojusipi/ezgfje4/watch_traffic_online_free_123.pdfIn PDF document text
    • https://cdn.sqhk.co/vimerokil/FVghbjb/used_bedroom_furniture_for_sale_near_me_craigslist.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/ghqicYY/vitosumivuduzafoderavu.pdfIn PDF document text
    • http://mestorating.ru/how_to_read_log-log_graphaluxs.pdfIn PDF document text
    • https://cdn.sqhk.co/rumomezojeku/igihhcV/fastest_pop_up_time_for_a_catcher.pdfIn PDF document text
    • http://accface.in/bugegidezedizunotakukufwp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463807/normal_5fdd00d1b48c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386337/normal_600a7f0920f3a.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/0yUidJm/fake_call_app_online_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387589/normal_602967acdfa67.pdfIn PDF document text
    • http://mazers.fun/kiwutilakuzue0h8n.pdfIn PDF document text
    • https://cdn.sqhk.co/gazegarov/jbihYih/olympics_2020_skateboarding.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/5a80380b-927c-4f16-82ad-1ad4a1179488/bigibuwab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2758255-810f-44a6-97b0-0d9027437162/folexederadipufo.pdfIn PDF document text
    • http://zasegusof.epizy.com/97900356995.pdfIn PDF document text
    • http://julukawava.epizy.com/671289413.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_off0000eaf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF8 5584 bytes
SHA-256: 677e56c5f152d5627aca0249dc6e763198a75ddbcf88c3c37a14a7ba1d602874
font_01_sfnt_off0000fe0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0D 11572 bytes
SHA-256: e4c0b31f2f59452ace7b346e234a1db48490b6242976d387631754122ace2083

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