Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed6b142790b3c39…

MALICIOUS

PDF

75.1 KB Created: 2021-03-24 00:51:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 945831a8735068687ff9d8284b9df5c1 SHA-1: d6378045cbdfe16a8792808030f26a0dd3c561bc SHA-256: eed6b142790b3c393425c2b497bfe3173edabbe3b042c3a2f142b478e93a962f
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 and exhibiting link farm characteristics, suggesting a phishing or malware distribution attempt. ClamAV and ML classifiers flagged this file as malicious, specifically as a phishing trojan. The presence of external URIs and the overall structure indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/123?utm_term=free+able+calendar+september+2019 PDF link annotation
    • http://tobufupevujuma.mygamesonline.org/the_different_aspects_of_islamic_culture_unesco.pdfIn PDF document text
    • http://love-your-lips.online/85432034895xa3n9.pdfIn PDF document text
    • http://stassikorskyi.com/100_aos_de_soledad_significado_del_titulo82ho5.pdfIn PDF document text
    • http://leseweremizew.scienceontheweb.net/puluzopa.pdfIn PDF document text
    • http://kerosijuvibeg.scienceontheweb.net/chemistry_book_for_class_10_federal_board.pdfIn PDF document text
    • http://bojapebonan.22web.org/portable_reloading_bench_ideas.pdfIn PDF document text
    • http://ferafukapawap.scienceontheweb.net/alex_rider_serie_tv_trailer_italiano.pdfIn PDF document text
    • http://gukivuzijisuva.getenjoyment.net/effective_communication_in_business.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/ditiruz/4563142802.pdfIn PDF document text
    • http://lesasesodimavun.epizy.com/zofidojepupe.pdfIn PDF document text
    • http://wokarodefi.onlinewebshop.net/30728023600.pdfIn PDF document text
    • http://peguretunemidom.rf.gd/60036019055.pdfIn PDF document text
    • http://zazufazujinuzo.rf.gd/rokumimaxuridokujakabuwi.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/electrotechnics_n6_questions_and_answers.pdfIn PDF document text
    • http://xologikaju.atwebpages.com/download_hp_elitebook_6930p_drivers_for_windows_8.1.pdfIn PDF document text
    • http://zepuwiz.atwebpages.com/7281524662.pdfIn PDF document text
    • http://puredaw.rf.gd/gta_v_lspdfr_install_guide.pdfIn PDF document text
    • http://xodolipifonabo.epizy.com/bsa_pets_merit_badge_requirements.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/north_by_northwest_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/mtd_21_inch_snow_blower_belt.pdfIn PDF document text
    • http://peworesafasar.epizy.com/algoritmo_aes.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_off0000e7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BD 5796 bytes
SHA-256: 7ee7ed65cc1e4bf6ebcf7761459b7c1651e958499c80b78a6111487efed8f359
font_01_sfnt_off0000fb59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB59 10544 bytes
SHA-256: 6e3b60aa61ff711c3bf9705a7036ac98d1544b695fce7ae82d0d56bd3ff8ec59

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