Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cb653b6859a95e0…

MALICIOUS

PDF

77.4 KB Created: 2021-04-04 04:52:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 7981a7a10d828e26e6138ae12337dd8a SHA-1: 999cabfa77a5823442b2d01b2ab61be9d0b3a75f SHA-256: 0cb653b6859a95e0f246d0cd163ec119c4175e9570439d90257c4ce4f142c2a3
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, mezovuduw.ru, which is flagged as external. Heuristics indicate the PDF is a link farm on disposable hosting, and ClamAV detected it as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/award?keyword=ganga+action+plan+project+pdf PDF link annotation
    • https://felixitu.weebly.com/uploads/1/3/4/0/134012625/3291755.pdfIn PDF document text
    • https://puraxexi.weebly.com/uploads/1/3/4/7/134718411/tugowolijugosi.pdfIn PDF document text
    • https://munejubulogulep.weebly.com/uploads/1/3/4/2/134266186/3504693.pdfIn PDF document text
    • https://pekumovulimezel.weebly.com/uploads/1/3/4/3/134363026/3935185.pdfIn PDF document text
    • http://kakorixow.mygamesonline.org/bahay_na_bato_floor_plan.pdfIn PDF document text
    • https://gijepunudadolow.weebly.com/uploads/1/3/4/4/134497403/b5cf58379b13.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/why_wont_my_brother_printer_print_in_color.pdfIn PDF document text
    • http://bebinovixox.iblogger.org/standard_aluminum_extrusion_profiles.pdfIn PDF document text
    • https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/jofujinalaliwipalug.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/rujabepifar/sony_pcm-m10_price.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/free_andmesh_cinta_luar_biasa.pdfIn PDF document text
    • http://lijowavatajo.myartsonline.com/captivate_us_watermark_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cee2d10-8edc-4f51-b8e1-beb4e90fc7af/calendario_de_dias_feriados.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8140ecb5-81d1-476f-80ff-588271d6ee68/icse_class_5_english_grammar.pdfIn PDF document text
    • http://sujotoginejo.rf.gd/rikakowaxumivujinupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8ef02b1-dc87-471c-bb8b-a5ac1d4111e0/piriformis_exercises_to_avoid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3294c416-0d20-4a38-843a-2dd5a2827b32/44563206570.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/zutinup.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/banting_grey_list.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/bachelor_of_arts_in_information_technology_jobs.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_off0000f280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF280 5252 bytes
SHA-256: 36230ed60ba8a3d317a65b87c39beae9b6b13b8b884533cc9b74dd028e339530
font_01_sfnt_off0001047a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047A 10600 bytes
SHA-256: 32e4759a01478bf95138748357cafe875ae8fe6da6d9a173844a37f0439204c8

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