Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d382c397c3f7dea…

MALICIOUS

PDF

75.6 KB Created: 2021-03-17 15:10:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 2d44672945eef0ca1554ed13cc3f96eb SHA-1: 4475ffaa4b6e7a867187aa762670c15c5b56d843 SHA-256: 0d382c397c3f7dea1e31d0138fdf370e262659ac0839e2bada33d62788b19a55
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/award?keyword=functions+of+proteins+in+the+body+pdf PDF link annotation
    • http://zutatowatipo.mywebcommunity.org/tm_meditation_technique_free.pdfIn PDF document text
    • http://tadurarawi.mypressonline.com/tuzumegudamat.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/cjiWibC/8860564424.pdfIn PDF document text
    • http://nekuwagibajese.getenjoyment.net/dan_schutte_mass_of_christ_the_savior_sheet_music.pdfIn PDF document text
    • http://kurs1.xyz/tournament_bracket_generatory691r.pdfIn PDF document text
    • http://com-signto5.xyz/latest_server_list_minecraft_pe_vnt3f9b.pdfIn PDF document text
    • http://gunofixe.medianewsonline.com/how_fast_does_a_coolster_150cc_atv_go.pdfIn PDF document text
    • http://hotloveme.online/how_to_add_a_table_to_wix_pagem1vdc.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/RZ40ifH/budunodedepobumejatanopig.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/dYGgkWF/translate_the_word_basketball_hoop_in_spanish.pdfIn PDF document text
    • http://daludaja.getenjoyment.net/apprendre_l_espagnol_livre_gratuit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459059/normal_604903265240b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373281/normal_6005e08ed2c92.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pabomajemoxu.rf.gd/cfa_level_1_2020.pdfIn PDF document text
    • https://36fc1fe3-b646-4cc1-b6e9-de51469aea27.filesusr.com/ugd/3eb4bd_6cba8e694ded4f57b5810fe6e46c0b26.pdf?index=trueIn PDF document text
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_32e3a9d826e04835b0af8f112157ad19.pdf?index=trueIn PDF document text
    • http://pudekixepubaz.epizy.com/biwotekajoxuze.pdfIn PDF document text
    • http://niwaraz.epizy.com/kolapugor.pdfIn PDF document text
    • http://gofikezepo.rf.gd/diary_of_a_wimpy_kid_disney_plus_original.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_off0000eaf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF7 5196 bytes
SHA-256: e22391a3123846c4658931f762eb36d9465a7bd73d8cdbe731cf462e8af36666
font_01_sfnt_off0000fca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA9 10732 bytes
SHA-256: 338ed6612beb3c37df6aa51d0a4e29100df91612ec2b3400b400d1397548c9e6

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