Malicious PDF — malware analysis report

Static analysis result for SHA-256 d478c12908a10a86…

MALICIOUS

PDF

77.9 KB Created: 2021-04-27 10:11:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3d03f94f6f6492aad500d9b1753c8f66 SHA-1: 2b36b2859fe38c399f817df3c8bd511adecc5701 SHA-256: d478c12908a10a86f6ae05d852b6aa9b2aef3c25511fa76c05d520218f53d01e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a potential phishing lure due to its UTM parameters and association with a link farm heuristic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure itself is used to host and present these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/strik?utm_term=outdoor+portrait+photography+poses+male PDF link annotation
    • http://fegokodelaxen.scienceontheweb.net/fozilipuwosuxe.pdfIn PDF document text
    • http://tuvosudokalidu.scienceontheweb.net/kubernetes_architecture.pdfIn PDF document text
    • http://particulier-societegenerale.xyz/627542519400fbqd.pdfIn PDF document text
    • http://gadivawiw.sportsontheweb.net/51054301895.pdfIn PDF document text
    • http://mutalunepemaw.22web.org/jaxifofal.pdfIn PDF document text
    • http://megidexabaror.mywebcommunity.org/40652088582.pdfIn PDF document text
    • http://myfavoritesun.xyz/whats_the_point_of_hidden_photos_on_iphonektb7k.pdfIn PDF document text
    • http://faxixovojaja.sportsontheweb.net/chemistry_a_molecular_approach_3rd_edition_solutions_manual_free.pdfIn PDF document text
    • http://copyrighthelpbusiness.net/the_holiday_streaming_vod8vgo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f59c0a4d-c104-43ac-8966-a5978cdf1b8c.filesusr.com/ugd/0c1ebd_f93a5a0e488948ab86cfb07cf7c5b1b7.pdf?index=trueIn PDF document text
    • http://raxajabidadida.onlinewebshop.net/logo_design_contest_guidelines.pdfIn PDF document text
    • https://77701ba7-c5ad-4750-ab17-5b03548f7fc0.filesusr.com/ugd/9a242c_78e611ff1cc346089411df7b6b21d6d2.pdf?index=trueIn PDF document text
    • http://wuwovedivaz.rf.gd/is_the_secret_life_of_bees_a_good_book.pdfIn PDF document text
    • http://fegoluvarelewum.myartsonline.com/donald_barthelme_not_knowing.pdfIn PDF document text
    • http://wupomadupu.epizy.com/acls_pretest.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/first_estate_clergy_definition.pdfIn PDF document text
    • https://d9226533-59f4-4737-ae77-cfa9cdee5378.filesusr.com/ugd/d7c203_5a54e4ede74743089adc29c5ffe500c8.pdf?index=trueIn PDF document text
    • http://zakesebamorime.rf.gd/rugepewomipepot.pdfIn PDF document text
    • http://weridujesuta.epizy.com/customer_journey_template_powerpoint.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/how_to_thread_singer_prelude_8280.pdfIn PDF document text
    • http://xufoziminep.onlinewebshop.net/wasujetatijukusakufukoba.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/muxefumekorivum.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/belzona_products.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/vuvagemozaweg.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_off0000f26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26A 5504 bytes
SHA-256: 8494dcf250e5812cf854e22eb74566136dc6e9548dba0fc10e97216e7e45ca8f
font_01_sfnt_off000104f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F9 10544 bytes
SHA-256: 77a605e6015bebe1070a723b67d1fd9ee41f6b963b66cc63d4ec14b7e7020317

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