Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb1a6911fa6a85ce…

MALICIOUS

PDF

74.0 KB Created: 2021-03-01 20:54:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 58e410203ed97c4a600a8061338b434f SHA-1: 3bb9f56cfcd0feb79e37f22ef47f8e35ac93001d SHA-256: bb1a6911fa6a85ce7fcd0f6b4f99bdf118b6e9b3e4b81615cb87d86e0267b9d9
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to domains associated with link farms and potentially malicious content, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The embedded URLs are designed to redirect users to external sites, potentially for credential harvesting or further payload download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://mezovuduw.ru/strik?utm_term=bushnell+neo+ghost+golf+gps+manual PDF link annotation
    • https://cdn.sqhk.co/rorajakura/gjjhajc/4257105301.pdfIn PDF document text
    • https://cdn.sqhk.co/nozedimasav/f0hjqk4/migene.pdfIn PDF document text
    • https://dutaveporope.weebly.com/uploads/1/3/4/6/134600224/luxawamodo.pdfIn PDF document text
    • https://bubafoxir.weebly.com/uploads/1/3/0/8/130874260/pijiki.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwoxegolewa/Qsomahb/sofa_apache_ii_calculator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392215/normal_60377464f289f.pdfIn PDF document text
    • https://cdn.sqhk.co/nusideja/abhevyW/destiny_child_mobile_game_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/7gEGz0O/52327050804.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/ggfhdjb/find_the_differences_detective_3_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/g4ibgi2/new_year_2020_stickers_for_whatsapp.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/mixanaz/sepsis_guidelines_lactate.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/bestwap._in_movies_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/92071624229.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/can_start_my_briggs_and_stratton_pressure_washer_wont.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/17515589748.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/71987672801.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/8386426479.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/ruzokeboxuguv.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_off0000e51e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51E 5268 bytes
SHA-256: 43225ff8bff71fd5b2d57e81a208abb0ab22036685410b63177d0398b8b719e7
font_01_sfnt_off0000f6ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EC 10380 bytes
SHA-256: 9c59e2257fc07bfd49748f2acce25a7073ed851037ab0d294fc6a3b9715e72aa

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