Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe32f0ed6b26e0d4…

MALICIOUS

PDF

76.6 KB Created: 2021-03-14 04:00:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a2b9411b053f0d8158f90f75806a10b3 SHA-1: a916bc9934e6692a7cae67c30a25853a66e6d276 SHA-256: fe32f0ed6b26e0d494af8f1e96f5090fcc683901905716ae924173ffed28bd5c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically disguised as a 'Pokemon redeem code free'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting malicious intent. ClamAV detection and ML classification further confirm the malicious nature of the file, likely serving as a phishing lure or a downloader for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/strik?utm_term=pokemon+redeem+code+free PDF link annotation
    • https://cdn.sqhk.co/dajebala/dhihfhc/rally_health_inc_washington_dc_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/zarejesorufo/QgjyIoK/video_maker_fx_gratis.pdfIn PDF document text
    • https://cdn.sqhk.co/rosojolude/jjnJnKQ/rodasobexin.pdfIn PDF document text
    • http://gutprod.xyz/osrs_black_demons_slayer_guidelxn1j.pdfIn PDF document text
    • https://cdn.sqhk.co/gunobawiwax/hcjcxw0/random_video_calling_chat.pdfIn PDF document text
    • http://kupelobivinix.22web.org/42018052640.pdfIn PDF document text
    • http://thecaffeinatedstudent.com/muruwoneue8q3.pdfIn PDF document text
    • https://cdn.sqhk.co/vuramufef/TJiageP/kulodomefesebo.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/P8gijij/princess_gloria_makeup_salon_download_apk.pdfIn PDF document text
    • http://sanatoriy-izumrudny.ru/leadership_the_one_minute_managernb91u.pdfIn PDF document text
    • https://cdn.sqhk.co/fefuxumito/ajgdhca/rirazotuxo.pdfIn PDF document text
    • https://cdn.sqhk.co/lexijunibul/xmljajj/manualidades_de_navidad_con_reciclaje_para_nios.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mugosovexu.epizy.com/dekezikogaganovenon.pdfIn PDF document text
    • http://dezazikep.epizy.com/dongri_to_dubai_download_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/skyworth_43_led_tv_review.pdfIn PDF document text
    • http://kavejanunar.epizy.com/bbc_iplayer_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/vamavogilesokaberojaso.pdfIn PDF document text
    • http://rokodejufoda.rf.gd/juduwugetubiv.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/facebook_transparency_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/80337532692.pdfIn PDF document text
    • http://sarebabeb.epizy.com/vasom.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_off0000f061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF061 4812 bytes
SHA-256: 73dfee1ae7f4b111938429e70cbe55633fd249c0b899e395a3c81b901d86444f
font_01_sfnt_off000100b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B5 10804 bytes
SHA-256: 354586b573af14e5bd1f42aabf822113073d387092f47e098f08b34aef2d3ccf

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