Malicious PDF — malware analysis report

Static analysis result for SHA-256 752485c5f30968a0…

MALICIOUS

PDF

75.3 KB Created: 2021-03-23 06:35:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 2b9cc73aa01c8526e76f3ea9e228fee0 SHA-1: 5a6976738a1388b8c2f5a20c88556cb26be3610a SHA-256: 752485c5f30968a09b85c6413d792ec6821dda3cc5ff1ac6dff77a2c667dec06
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection scheme for malware distribution or phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

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://druttle.ru/award?keyword=middle+school+vocabulary+words+pdf PDF link annotation
    • http://ideal-it.fun/delobuwefagoliw4u0b2.pdfIn PDF document text
    • https://kadamoxezegawuf.weebly.com/uploads/1/3/4/3/134347408/vaxala.pdfIn PDF document text
    • https://lewebivaduxug.weebly.com/uploads/1/3/5/3/135392118/fefulu.pdfIn PDF document text
    • https://vubanuta.weebly.com/uploads/1/3/5/3/135348855/9914648.pdfIn PDF document text
    • http://zikewexer.scienceontheweb.net/methodical_deception.pdfIn PDF document text
    • http://7lessons.site/comcast_x1_remote_control_setupkt2di.pdfIn PDF document text
    • http://ideaita.fun/55278542800mr4j1.pdfIn PDF document text
    • http://dulexip.22web.org/iupac_nomenclature_practice_worksheets_class_10.pdfIn PDF document text
    • http://idealslimitalia-official.site/73228700291zqeeu.pdfIn PDF document text
    • http://tehnotop.store/arqueologia_mexicana_el_maizmymhf.pdfIn PDF document text
    • http://dontbeshy.xyz/tafumikal23.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://malejubu.myartsonline.com/apache_poi_create_example.pdfIn PDF document text
    • http://kagejadel.epizy.com/ps_vita_emulator_1.4.1_download_for_android.pdfIn PDF document text
    • http://kulinikono.epizy.com/xabeninepab.pdfIn PDF document text
    • http://xowilewegiwo.myartsonline.com/69378976933.pdfIn PDF document text
    • http://vidavizulovox.rf.gd/arrocera_oster_4723_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3080a9a-544b-47a8-b082-9d42d0d7a128/batman_the_killing_joke_joker_and_barbara.pdfIn PDF document text
    • http://duziroro.myartsonline.com/what_if_marvel_episodes_names.pdfIn PDF document text
    • http://pebomotixot.myartsonline.com/miss_peregrine_home_for_peculiar_movie_stream_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f7d098f-45e1-4adc-b9a3-01731a5ba21d/body_champ_inversion_table_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a38d7ef3-1f82-4e12-a70e-a048599d2aa4/good_sci_fi_books_for_adults.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_off0000e724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE724 5640 bytes
SHA-256: 8a8869a0eff811871b840cfec736979a15bdfc62d48eb1be0740939b24313a1c
font_01_sfnt_off0000fa75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA75 11104 bytes
SHA-256: 13beb7c17fa6c92725062c9da7a6ee3349ee7e58c70c6663daafc918222a1631

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