Malicious PDF — malware analysis report

Static analysis result for SHA-256 db69cd2206efe142…

MALICIOUS

PDF

76.7 KB Created: 2021-02-23 06:58:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: eb9fbe894ca180056554b9e86cb1b47d SHA-1: 1d92fcd3628b1eaef2b2f25de20afb6df239a380 SHA-256: db69cd2206efe142c5c0d18616db295531c6305df017fa154a197e04276bdd0e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body text, though heavily obfuscated, contains a search query related to 'Lenovo t430 ram type', suggesting a lure to attract users searching for specific hardware information.

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://baarspo.ru/strik?utm_term=lenovo+t430+ram+type PDF link annotation
    • http://vukogosapejofa.iblogger.org/pimewogodokutigukej.pdfIn PDF document text
    • http://ritikutoxukor.22web.org/factoring_by_grouping_worksheet_answer.pdfIn PDF document text
    • http://dewigogazesad.iblogger.org/62986321674.pdfIn PDF document text
    • http://zonodejizifiti.iblogger.org/harry_potter_and_order_of_the_phoenix_book.pdfIn PDF document text
    • http://momenujobig.22web.org/best_punjabi_caller_tune_2019.pdfIn PDF document text
    • http://malevularis.22web.org/wozitemixixopepumit.pdfIn PDF document text
    • http://adminhalil.com/is_spice_and_wolf_manga_finisheddm4bb.pdfIn PDF document text
    • http://hotsales-com.xyz/ciclo_ovarico_y_menstrual_es_lo_mismoyvoiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kenuzuwemonuda.epizy.com/adblock_app_for_android_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/46727964819.pdfIn PDF document text
    • http://jasosuwer.epizy.com/beholder_apk_4pda.pdfIn PDF document text
    • http://xalesikejuxo.epizy.com/editable_calendar_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/cinema_21_film_yowis_ben.pdfIn PDF document text
    • http://jedabotuz.epizy.com/48792952908.pdfIn PDF document text
    • http://sonasekofuxix.rf.gd/android_7._1._1_frp_bypass_2019.pdfIn PDF document text
    • http://surotipetufamam.rf.gd/tuvugixekogikatefu.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/31133413358.pdfIn PDF document text
    • http://fizenigapajawak.epizy.com/bladen_online_crime_report.pdfIn PDF document text
    • http://masusekokuberex.rf.gd/55840999272.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_off0000ed51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED51 5252 bytes
SHA-256: a73d6e8bee7003271e52e25a52ec52ac03d1e82f92ad8d2edcd111a0bae3e89b
font_01_sfnt_off0000ff32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF32 11368 bytes
SHA-256: 8681dd6111a7a6dc6eb4d352d41df9141a7a26c7813fef1e1bd47c870e3c9338

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