Malicious PDF — malware analysis report

Static analysis result for SHA-256 d05aeb6a78d23c1c…

MALICIOUS

PDF

89.9 KB Created: 2021-05-02 13:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 141dfbccef5bfc6fad2d8df2d3881eca SHA-1: 508dfe47e4a15a930a910b2be4bc9087f17158b8 SHA-256: d05aeb6a78d23c1ce8e2c90acd515db117afb87ae266107515ad043f0f88029b
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains numerous embedded URLs, with one prominent URL pointing to a domain that appears to be a redirector for a malicious campaign. The document body, though heavily obfuscated, contains text related to reviews and application details, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xajibur.ru/strik?utm_term=the+killing+of+uncle+sam+reviews PDF link annotation
    • https://cdn.sqhk.co/lituxopevuk/1C96WPt/23643496750.pdfIn PDF document text
    • http://fodamibokaf.66ghz.com/arthashastra_in_marathi_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kogeledewafo/hajcib7/12928282543.pdfIn PDF document text
    • http://funewiwawako.iblogger.org/25285997777.pdfIn PDF document text
    • https://cdn.sqhk.co/dazibewibu/7MUcbgh/entergy_power_outage_report_louisiana.pdfIn PDF document text
    • http://gidepel.22web.org/73163862083.pdfIn PDF document text
    • https://cdn.sqhk.co/govizanorev/gjvhdje/hanuman_vs_mahiravana_full_movie_300mb.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/wizakokowe/44161338036.pdfIn PDF document text
    • http://binaxasomeroxat.epizy.com/repubblica_aristocratica_peru.pdfIn PDF document text
    • http://rosunugi.epizy.com/86641949479.pdfIn PDF document text
    • http://fuguduvuduwir.epizy.com/latitude_and_longitude_practice_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/putafala.pdfIn PDF document text
    • http://runonadopufeta.epizy.com/xozuf.pdfIn PDF document text
    • https://d23eb412-52e1-45ef-a32a-0c032022daee.filesusr.com/ugd/03485a_de55e7ae10034ac4b1c1b55e66faeea7.pdf?index=trueIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_8c921fbff6754e03b30dd6c0e852a41b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/naxejemuzupipulij.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/how_much_does_an_aircraft_pre_buy_inspection_cost.pdfIn PDF document text
    • http://vawazovuvisu.rf.gd/what_does_the_end_of_rosemary_baby_mean.pdfIn PDF document text
    • https://1c437d0a-cccb-4a8a-93f1-39e0b5126915.filesusr.com/ugd/b91566_8f3b9ac498924e85af22844f431cc6eb.pdf?index=trueIn PDF document text
    • http://gugujis.epizy.com/bufewegibobekug.pdfIn PDF document text
    • http://pivirujifija.epizy.com/definition_of_corporate_culture.pdfIn PDF document text
    • http://somaguxu.epizy.com/legend_of_dragoon_strategy_guide.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_off00012000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12000 5460 bytes
SHA-256: 52221e87ab83c3a1c632e7268eb449e38ba47568c5671cde5604d77e4f5b0993
font_01_sfnt_off00013286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13286 12004 bytes
SHA-256: cfdd8c1b36b1e1c351dbdbc44944276bbf9d136b285329f40dd36c81b60452af

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