Malicious PDF — malware analysis report

Static analysis result for SHA-256 0469b1d659a86846…

MALICIOUS

PDF

72.9 KB Created: 2021-03-25 04:33:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 32c12370b6b2709a5b62d9b7c993bde1 SHA-1: d3927966f62c4de58ec2f21f54ac83e0994b7c47 SHA-256: 0469b1d659a868462875cfcc2c91a5e79b3232b9c694372a7990d06077ae8116
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and appear to be part of a link farm designed to mimic search results. The primary URL, 'https://maypoin.ru/award?keyword=autodesk+inventor+sheet+metal+exercises+pdf', suggests a lure related to technical documents. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

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://maypoin.ru/award?keyword=autodesk+inventor+sheet+metal+exercises+pdf PDF link annotation
    • https://nizifaweneli.weebly.com/uploads/1/3/4/5/134589853/walevi.pdfIn PDF document text
    • https://dixoparogazasa.weebly.com/uploads/1/3/1/8/131871726/825bafe2ba9b7f2.pdfIn PDF document text
    • http://wumewil.sportsontheweb.net/82556409199.pdfIn PDF document text
    • http://pasadurasasagi.medianewsonline.com/logic_language_and_reality.pdfIn PDF document text
    • http://fukazab.mywebcommunity.org/26646523922.pdfIn PDF document text
    • http://vozajomaralamer.mygamesonline.org/data_science_do_zero._primeiras_regras_com_o_python.pdfIn PDF document text
    • http://zodagudego.iblogger.org/babotipomiwoniwivageg.pdfIn PDF document text
    • http://wazasoku.iblogger.org/tratamento_cirurgico_hernia_de_disco.pdfIn PDF document text
    • https://razavewi.weebly.com/uploads/1/3/0/8/130813306/tusexakax.pdfIn PDF document text
    • http://nitapida.mywebcommunity.org/tesaxutemazulugit.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/legobegutulo/music_albums_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91439fd4-f4ea-49e7-8db5-3fe41237238d/hse_manager_salary_in_abu_dhabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b806cb97-e5fb-466e-a5b0-b6cd22b51d3b/70359739207.pdfIn PDF document text
    • http://konevimojo.epizy.com/robilosatosapirivu.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/tudakodivovedikaburarab.pdfIn PDF document text
    • http://faletabud.epizy.com/rewidaganobuwigox.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/26848544820.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/34338713207.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6b76a94-ed7e-4dd1-bb9b-edf7e400ea14/zubigulumotutubimar.pdfIn PDF document text
    • http://dapuseda.rf.gd/netflix_premium_apk.pdfIn PDF document text
    • http://domekififij.epizy.com/wuxoxowageligufow.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B2 3068 bytes
SHA-256: 4cda96233093d0b46c04168453f55303edb80dd7555a7ebb0b9e3102f08653ea
font_01_sfnt_off0000dcaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAF 5576 bytes
SHA-256: 5457e5548b8bd9d95cd98f3a6842a2cd6433916dd7d8fb924380b6b1176acd9c
font_02_sfnt_off0000ef89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF89 10832 bytes
SHA-256: 1477479a3fff4af54ba291ff264d7f56034699a4fc660dc592e4241917627e79

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