Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca5f1612a2b40796…

MALICIOUS

PDF

74.4 KB Created: 2021-03-21 00:46:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 59da217053db75f435dc9cced8cef068 SHA-1: 227648dc64aa1aacc6487dd64a049794a86ae2f2 SHA-256: ca5f1612a2b407963a63b9b30f8006325041296c957fdfb5013557d8db71fe2f
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, appears to be related to the query 'what does the bottom left side of the brain control', likely a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://nipisod.ru/strik?utm_term=what+does+the+bottom+left+side+of+the+brain+control PDF link annotation
    • http://tezijexipilimo.getenjoyment.net/broiler_chicken_production.pdfIn PDF document text
    • http://7lessons.fun/zipugutebepepeg3q16.pdfIn PDF document text
    • https://niritopep.weebly.com/uploads/1/3/4/6/134634222/3002516.pdfIn PDF document text
    • http://lozejebivo.scienceontheweb.net/boxaderimokadoxinox.pdfIn PDF document text
    • http://dream-stat.ru/wozorugusibanomelinisut8spfd.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/bRibYBC/70415307340.pdfIn PDF document text
    • https://xavamukunakupa.weebly.com/uploads/1/3/1/4/131437969/bfe4c4d36.pdfIn PDF document text
    • https://cdn.sqhk.co/kufusivekogo/hchiRha/gunship_strike_mod_apk_unlimited_all_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wajidafix/KGFhia6/xuvujuromakoxenaxag.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxubefe/hiDhj9L/bunasinib.pdfIn PDF document text
    • https://woperuxotuxolo.weebly.com/uploads/1/3/4/8/134849923/tiwusekifat.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzewekafan/cifPzhd/download_dragon_mania_legends_cheat_mod_apk.pdfIn PDF document text
    • http://hookup673.site/text_png_hd_zip_file_downloadmg3j6.pdfIn PDF document text
    • http://wwnews.site/53722016480w77ob.pdfIn PDF document text
    • https://woxexawunum.weebly.com/uploads/1/3/0/7/130776255/7522196df86.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bozagasixafovo.atwebpages.com/makitikokalinitafufubu.pdfIn PDF document text
    • http://volififujuwimi.epizy.com/95099630460.pdfIn PDF document text
    • http://farilofisimoru.rf.gd/95942043201.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/auxilium_convent_school_barasat_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/asuran_bgm_full.pdfIn PDF document text
    • http://xejonitofopim.epizy.com/nerovowaxenibavebi.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/jamusobifudotakuzevut.pdfIn PDF document text
    • http://lakumufo.epizy.com/transistor_switching_circuit.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_off0000e484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE484 5416 bytes
SHA-256: 74e3cca3f5e2553f9353b8b059846c174465cde8dd0eb990a30243ce63bbac46
font_01_sfnt_off0000f6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CD 11052 bytes
SHA-256: 7242e2242e0d955c3666ad8958c07345f38b6295dfde75940e0185d9eaecb7db

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