Malicious PDF — malware analysis report

Static analysis result for SHA-256 a93baaadd2947f21…

MALICIOUS

PDF

82.7 KB Created: 2021-03-16 04:54:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 117a48f156d6b36a29b02eae004aa9ed SHA-1: 22e89ebeee2d5ac18235ee59ff03315a9bd355ed SHA-256: a93baaadd2947f216e8318f2e691d09984510b5b0d09447d5cfe83844924dfdc
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://xezojetit.ru/strik?utm_term=is+harry+potter+and+the+cursed+child+an+ar+book PDF link annotation
    • https://cdn.sqhk.co/fusozuwalas/EU1yje9/beyblade_burst_rivals_mod_apk_unlimited_money_download.pdfIn PDF document text
    • https://cdn.sqhk.co/berirenike/ii7jfhg/digestive_system_diagram_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/peretudiwi/Gih7jdS/gitejobejuxezarudexeme.pdfIn PDF document text
    • https://cdn.sqhk.co/vugiboba/jjwiegg/idrivesafely_drug_and_alcohol_course_answers.pdfIn PDF document text
    • http://cryogen.me/vudodawomadupuje1tu5g.pdfIn PDF document text
    • https://cdn.sqhk.co/xakurusuk/bhcBlCt/pabafotixotujikopotuli.pdfIn PDF document text
    • https://cdn.sqhk.co/pegipoveridi/Iyheigf/towawaforubine.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/fZGM4EJ/d_day_normandy_movie_trailer.pdfIn PDF document text
    • https://cdn.sqhk.co/jemajujo/0uhejeq/visual_studio_code_git.pdfIn PDF document text
    • http://sodahub.pro/chronicle_of_a_death_foretold_analysisb8u0g.pdfIn PDF document text
    • https://cdn.sqhk.co/sabumijobude/Fighgia/79741811980.pdfIn PDF document text
    • https://cdn.sqhk.co/jojipimuve/jhKiaq0/amtrak_auto_train_arrival_time_sanford.pdfIn PDF document text
    • https://cdn.sqhk.co/tovizabep/gjOAiaG/empty_room_template.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziboporo.epizy.com/nimulufugujatixupamalivu.pdfIn PDF document text
    • http://zojasofox.epizy.com/tipo_de_comunicacion_organizacional.pdfIn PDF document text
    • http://gebozobab.epizy.com/convertir_de_a_word_nitro_online.pdfIn PDF document text
    • https://63b1f34b-4847-450f-8d9a-4788d10e1cf5.filesusr.com/ugd/451a43_fd6757634c944a05a8da4fbf07315546.pdf?index=trueIn PDF document text
    • http://wovitoted.epizy.com/57803774051.pdfIn PDF document text
    • https://d54d55f4-8004-4613-9f19-7b96cbed0ae7.filesusr.com/ugd/ce4b32_fd2e128e739448a38d9bbaa87291773a.pdf?index=trueIn PDF document text
    • https://fed4949e-3809-4fc0-a28b-84c5d390f589.filesusr.com/ugd/94482e_7e1a7f47dcd7460f9da14a4934fbf086.pdf?index=trueIn PDF document text
    • http://nibekiwimuzev.epizy.com/medical_terminology_words.pdfIn PDF document text
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_d15351957d224499aba7b4ee08b71162.pdf?index=trueIn PDF document text
    • https://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_030b1f7e849542f3b99d18bffe92340c.pdf?index=trueIn 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_off0001032e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032E 5404 bytes
SHA-256: 1b3a349335d44b550fed65a2bec2cd7485b0467975c20260d2f368e9d9cb3398
font_01_sfnt_off00011586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11586 11088 bytes
SHA-256: 28ed7546070c53f7b28f60d91ae94dc8caa1a8360915b7bbbc16b8e395b859b7

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