Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a86e4fea0b4a309…

MALICIOUS

PDF

78.3 KB Created: 2021-05-02 18:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2f8a840120989e956f2c60181ad949fc SHA-1: 9b1538a006345a604e6e374e41c66f53cc3ce0af SHA-256: 0a86e4fea0b4a309f5d636d321205263261fc6c97fa8d360246faa732f61e79b
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 redirector for a search term. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a tactic to obscure the true destination by using many disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://leonvi.ru/strik?utm_term=dodge+mechanic+shop+near+me PDF link annotation
    • http://lukufogud.getenjoyment.net/felojebenat.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/zurakopu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458848/normal_6054c2fe0d4dd.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/8hezgmQ/my_talking_tom_download_for_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499351/normal_5ff66fe088d38.pdfIn PDF document text
    • https://cdn.sqhk.co/wenegifuteg/12Uje3S/beetroot_powder_dosage_for_performance.pdfIn PDF document text
    • http://telovajov.medianewsonline.com/50199892938.pdfIn PDF document text
    • http://fonujameritules.getenjoyment.net/makalah_tentang_bahaya_rokok.pdfIn PDF document text
    • http://diporesorojina.scienceontheweb.net/wahl_cordless_chrome_pro_clipper_kit_ireland.pdfIn PDF document text
    • https://nefikeroliv.weebly.com/uploads/1/3/1/4/131453179/8682660.pdfIn PDF document text
    • http://tafuxasomup.getenjoyment.net/fipab.pdfIn PDF document text
    • http://tulusujubige.mygamesonline.org/a_little_book_on_the_christian_life_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/genizataxom/ighiid0/recipe_icing_carrot_cake.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/bhhagha/cute_short_hairstyles_for_thin_black_hair.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375531/normal_5fdddb8c2df1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373243/normal_60482f3bbf95d.pdfIn PDF document text
    • https://pisixaxonazav.weebly.com/uploads/1/3/5/3/135394173/6930299.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/nojemi/fuwalagojipawasuzajegoru.pdfIn PDF document text
    • http://vekamodadon.onlinewebshop.net/calistenia_plano_de_treino.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/bugowalowixutuzunelenuxev.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/macintyre_school_wingrave_ofsted_report.pdfIn PDF document text
    • http://tuwutexo.onlinewebshop.net/ge_adora_refrigerator_water_filter_light.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/us_visa_previous_work_education_training_information.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/pifikemojapuvoka.pdfIn PDF document text
    • http://dawejur.atwebpages.com/94143833999.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_off0000f3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C4 5452 bytes
SHA-256: 45ecc5241aa8dfcc9fa22389868cc633cc11bec51eccfab784616c4c294b7d69
font_01_sfnt_off0001062d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062D 11064 bytes
SHA-256: d2792cbba30ee5c962507713b81afda6a860b5273c816c69b101d358b297df0a

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