Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae8d86355378324…

MALICIOUS

PDF

83.9 KB Created: 2021-04-04 13:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 5703bf3416beb9227aad8273c2e60c22 SHA-1: 56d01fd166c44fc69b955764c60b36c0a05170c3 SHA-256: 2ae8d8635537832489748633361221badfb470702dc7cfb75accbbb14f9e71ad
166 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pelibifir.ru/award?keyword=descargar+guia+autometrica+2020+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443823/normal_5fd82b3ae4472.pdfIn PDF document text
    • https://kinigapiluxuke.weebly.com/uploads/1/3/4/8/134863840/xevejixedobab-ponumuvuwij-koman.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407299/normal_603045935b866.pdfIn PDF document text
    • http://tojukuw.iblogger.org/new_aged_care_standards_2020.pdfIn PDF document text
    • http://fezideruxojogo.iblogger.org/57686527201.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421764/normal_606395a67e093.pdfIn PDF document text
    • http://fabikaj.iblogger.org/bofobimij.pdfIn PDF document text
    • https://gegaminowudajun.weebly.com/uploads/1/3/4/0/134041134/34a63f0ee6157.pdfIn PDF document text
    • http://xokodiraki.22web.org/66780298061.pdfIn PDF document text
    • http://zelafagilu.iblogger.org/81739236324.pdfIn PDF document text
    • http://sait-ok.ru/international_financial_services_centre_ifsc_indiakvceq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417653/normal_6026e07c7442e.pdfIn PDF document text
    • http://omynutural.space/69538340901bvoci.pdfIn PDF document text
    • http://lodijijewotiviw.iblogger.org/dr_joe_dispenza_becoming_supernatural.pdfIn PDF document text
    • http://hot-money.fun/free_download_gims_maluma_hola_senor2qh0v.pdfIn PDF document text
    • http://rotefivalo.22web.org/common_biases_and_errors_in_decision_making.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/what_topics_are_in_algebra_1ms7yy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/street_fighter_iv_ce_apk_unlocked.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/ziruguzafoj.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/what_is_the_main_purpose_in_writing_an_informative_essay_quizlet.pdfIn PDF document text
    • http://fudejavifexas.epizy.com/what_happened_in_the_book_of_life.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/zodafaxaji.pdfIn PDF document text
    • http://gibegedagaseri.epizy.com/50290384302.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/64881238257.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF061 5716 bytes
SHA-256: 9c2deae3fe1efd50b2b0529923e8c12c7f2e5c602d9db69f67c6ffe82b39bf9b
font_01_sfnt_off000103d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D1 11680 bytes
SHA-256: acc30401bcd2d2aae9031836b6fccad56ad7f2089c44c5779dfd942b345bfa22
font_02_sfnt_off00012a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A5B 16312 bytes
SHA-256: 975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15