Malicious PDF — malware analysis report

Static analysis result for SHA-256 56dcd7eb31131e68…

MALICIOUS

PDF

78.7 KB Created: 2021-04-08 07:41:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 55c6b98761e0ed04ff8a5f658383fe8b SHA-1: 315905e2d3080c057797f222af6fdc4a3b698151 SHA-256: 56dcd7eb31131e680dbc889eac8fdbe153756c4130423a0086995a9e03f2c430
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that point to suspicious domains, and heuristic analysis indicates it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to harmful content.

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://xezojetit.ru/strik?utm_term=macbeth+act+1+scene+2+summary+and+analysis PDF link annotation
    • http://xariketixagat.mypressonline.com/biwipug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369916/normal_5fecee9fa39e8.pdfIn PDF document text
    • https://cdn.sqhk.co/vomemubevu/gicihrQ/xibibabupopenukutiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390383/normal_6057edeb0de4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404976/normal_60599b5531cb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391317/normal_6032994c4369d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470014/normal_6064ad1fda81d.pdfIn PDF document text
    • https://vadurevagide.weebly.com/uploads/1/3/3/9/133999829/vuxavewis.pdfIn PDF document text
    • https://lafatizurekasat.weebly.com/uploads/1/3/4/7/134748402/b8382fe739e7.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/vesopuxexa.pdfIn PDF document text
    • https://cdn.sqhk.co/vedoreket/jdbgcAb/gemolerifafakolade.pdfIn PDF document text
    • http://zuxekagapefe.mygamesonline.org/what_is_noise_in_the_knife_of_never_letting_go.pdfIn PDF document text
    • https://cdn.sqhk.co/nixivezez/gdxiggc/pokemon_the_movie_detective_pikachu_trailer.pdfIn PDF document text
    • https://gozowejikagigu.weebly.com/uploads/1/3/5/3/135345496/37854d3ddbd2.pdfIn PDF document text
    • https://vazonani.weebly.com/uploads/1/3/1/8/131871537/fogiganaxan-bobirir-zufipaxob-legotuwow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382186/normal_5fde0191d5c04.pdfIn PDF document text
    • https://cdn.sqhk.co/gesaxamadew/jrdJhaI/pappu_curry_ela_cheyali.pdfIn PDF document text
    • https://cdn.sqhk.co/podiwilur/shbAgck/miwixekomifuwelisiwan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369158/normal_601c6bb55ea92.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_85a3e698271c4cf9b6a00adf1e439295.pdf?index=trueIn PDF document text
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_cc3d6a5649264ee897875725466e1d1d.pdf?index=trueIn PDF document text
    • http://xakagigoneliv.myartsonline.com/kindle_kfx_to_calibre.pdfIn PDF document text
    • https://f3c4034a-4a94-4c47-b6c5-0445626d7bf8.filesusr.com/ugd/655f09_103910fb60bf4e4cb2d5efd486d54db0.pdf?index=trueIn PDF document text
    • http://kakasis.onlinewebshop.net/why_classical_period_is_called_age_of_reason.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_off0000f390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF390 5612 bytes
SHA-256: 117f6abd4e5eb5cdfd226324a1e3824dc02902de88ec4f587def4770ba8fa8ee
font_01_sfnt_off0001068b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068B 10844 bytes
SHA-256: 7d2b2b302853041938d0e1639bdf090599192125a0a4fc67ecc326f23ac413a1