Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2b8ce09a68d62e…

MALICIOUS

PDF

77.1 KB Created: 2021-02-25 15:44:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a80c49fa0acb50254763375d4e7928b5 SHA-1: fe1f3bac6df10f99d6cf6e03842b54083d36fb73 SHA-256: fd2b8ce09a68d62ea68975fd235c52310d279beb4b7808dc291b578a6ea71e88
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URLs, with one prominent URL suggesting a lure related to car sales. The presence of embedded URLs and the 'link farm' heuristic further support a malicious intent to redirect users to potentially harmful 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://seumenha.ru/wb?keyword=lexus%20es%20350%20f%20sport%20for%20sale%202015 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4486350/normal_5ff04c8637600.pdfIn PDF document text
    • http://bimiwefumukiv.22web.org/nesizinirudogojivulo.pdfIn PDF document text
    • http://hurricane1.space/sabuxugupotikufolatlc2lk.pdfIn PDF document text
    • http://salleapp.xyz/1839854158oq402.pdfIn PDF document text
    • http://gadifurewurol.22web.org/metformin_tablets_850_mg_for_horses.pdfIn PDF document text
    • http://natiral.space/zenonia_5_unlimited_stats_and_zen_apk41x3d.pdfIn PDF document text
    • http://erogan24.website/4627686241xngzj.pdfIn PDF document text
    • http://1green.space/caltrans_bridge_design_detailsmhnbs.pdfIn PDF document text
    • http://doxisolawasusig.66ghz.com/photos_ananas_free.pdfIn PDF document text
    • http://banquepopulaire-fr.org/how_many_years_do_you_have_to_study_to_become_a_real_estate_agent14uar.pdfIn PDF document text
    • https://babotiditufo.weebly.com/uploads/1/3/4/6/134694550/9e3277c5ee65.pdfIn PDF document text
    • http://xviiivbgz.com/bashan_250_service_manualh3soo.pdfIn PDF document text
    • http://lnstagram-help-businesss.com/29859201666qzy2t.pdfIn PDF document text
    • https://molawaxurot.weebly.com/uploads/1/3/4/6/134699933/rezabovedina_dofovoxogusoxok_migid_fumamanodotodal.pdfIn PDF document text
    • http://zowifupure.iblogger.org/how_to_clean_jacuzzi_tub_jets_with_bleach.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tewidunutazi.rf.gd/hungry_shark_evolution_hack_apk_uptodown.pdfIn PDF document text
    • http://xoritafojibi.epizy.com/free_palmistry_reading_in_hindi_online.pdfIn PDF document text
    • http://gegawuwiru.epizy.com/85180593299.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_off0000f11e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11E 5520 bytes
SHA-256: 56368eabb3a801e8758af10f4059eeeaa72cdf5e3751d69dd6486cce587303ec
font_01_sfnt_off00010403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10403 10368 bytes
SHA-256: 2bc4e4c61fa85b1001c769682c14a2935af742d33f871117349730d64000729f

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