Malicious PDF — malware analysis report

Static analysis result for SHA-256 e167a708868a9dca…

MALICIOUS

PDF

80.9 KB Created: 2021-03-23 20:50:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 330874d1ee270f2d292a4d18b03e7378 SHA-1: 7fc5ffac78ec16ef57927b500aa9b8ce10836860 SHA-256: e167a708868a9dca1aced5d808cd164c2862c31ed3d16a55d613ce5dedb7cc15
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to a book title, directing users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://ponafet.ru/wix?keyword=libro+el+ahogado+mas+hermoso+del+mundo+pdf PDF link annotation
    • http://sehq.xyz/the_little_red_hen_teaching_activitiesr7un3.pdfIn PDF document text
    • http://supermagazforsale1.xyz/nidiwujokiretqz9x9.pdfIn PDF document text
    • http://get3creditscores.info/76446847533usqe9.pdfIn PDF document text
    • http://study-english-05.site/57660307797ki70o.pdfIn PDF document text
    • http://playmarket-online.com/purple_butterfly_images_freeu888j.pdfIn PDF document text
    • http://vadonodip.22web.org/sta_rite_well_pumps_near_me.pdfIn PDF document text
    • http://keysecret.ru/1207884750478eeg.pdfIn PDF document text
    • http://tamigome.scienceontheweb.net/interview_questions_for_cabin_crew.pdfIn PDF document text
    • http://geleostone.online/2035451133tskr9.pdfIn PDF document text
    • http://nesebonuvobeju.getenjoyment.net/acetaminophen_davis_plus.pdfIn PDF document text
    • http://marketeuro.pro/convert_27_months_to_fortnights3eosg.pdfIn PDF document text
    • http://lnstagram-verifedbadge.com/82823705472rzz08.pdfIn PDF document text
    • http://housefashion.ru/honda_civic_service_schedule_ukgenqk.pdfIn PDF document text
    • http://urro-hu.com/high_hopes_sheet_music_pink_floyd5gzrt.pdfIn PDF document text
    • http://kudikadip.getenjoyment.net/dbt_skills_training_manual_first_edition.pdfIn PDF document text
    • http://all-system7.club/dream_piano_tiles_2020_mod_apkucsnt.pdfIn PDF document text
    • http://fafuzum.sportsontheweb.net/whirlpool_cabrio_dryer_parts_diagram.pdfIn PDF document text
    • http://tdsevsvet.ru/how_to_get_good_at_eso_pvpj9mtp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://964beff5-d24f-450a-94e2-fa7e9faef44a.filesusr.com/ugd/61158f_c5cf573dbd704299821e55a8bc4cc407.pdf?index=trueIn PDF document text
    • http://natorow.rf.gd/85421146407.pdfIn PDF document text
    • http://satogitexuvo.myartsonline.com/99283041212.pdfIn PDF document text
    • https://1b6a1bbc-c127-422b-858f-c975555fd18f.filesusr.com/ugd/31f47c_f1377680e63741779eb57594c2ab2788.pdf?index=trueIn PDF document text
    • https://6bc61794-ec17-45f1-96eb-8bed4cd57308.filesusr.com/ugd/217b8a_6fec9a7f6b274dc8be79ed31ebb1568f.pdf?index=trueIn PDF document text
    • http://pofulokadez.rf.gd/renfe_cercanias_madrid_mapa.pdfIn PDF document text
    • https://6f0a1f77-3195-4c90-aae7-8e5805bb56bd.filesusr.com/ugd/f94fd0_01bd46b2005b4e4ebbf35e54cdff6e2d.pdf?index=trueIn PDF document text
    • http://besaware.epizy.com/driving_performance_evaluation_score_sheet_california_meaning.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_off0000ed93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED93 5536 bytes
SHA-256: 7b5da56d0068203e1ad2f9fcc3a84a0a51da388cd9d0cedf34896e0eef7a1573
font_01_sfnt_off0001002f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002F 2820 bytes
SHA-256: 6ea1df016779df5a70f604b456ef7b19b092ade6237b4b0d12032a1f83242e1f
font_02_sfnt_off00010c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C21 12180 bytes
SHA-256: f7c6e46591b38651e8273223a2e9bc92cc2087759a2d82c90cb36e4e27a68e64