Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dff6ca440e1c1de…

MALICIOUS

PDF

92.8 KB Created: 2021-03-18 05:45:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f37e38def4668f67dd959deaf37415fd SHA-1: 5a864bab4150ec465f0229ed3d009b87e46186c8 SHA-256: 9dff6ca440e1c1defb9dd92385dab237e8e2eab2ce0a346e9291f8d44d5f8d8a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://jacksth.ru/award?keyword=sql+interview+questions+for+developers+pdf PDF link annotation
    • http://mibikazut.mypressonline.com/reading_and_writing_curriculum_guide_deped.pdfIn PDF document text
    • http://sewakasatixori.medianewsonline.com/swimming_pool_architectural_drawings.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/93849095196jr117.pdfIn PDF document text
    • http://beremoter.online/tejumuguvskhn7.pdfIn PDF document text
    • http://teren.fun/biwejus7ycn.pdfIn PDF document text
    • http://100naturals.fun/rejibotudanupidupajerc0j7.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/what_is_the_point_of_waste_recycling_centre.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/the_lady_with_the_dog_theme.pdfIn PDF document text
    • http://kijofizovurisos.medianewsonline.com/chrome_flash_settings_ipad.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/fuwuzerijofa/lineage_2_revolution_guide_equipment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36a98dfd-eed9-4fc7-91f9-9d93b6c1866f/85030730573.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/273f1c68-db44-4357-93ee-09ac12d61f64/jufanilotavedos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/655f6a92-435d-421c-bfcf-ae087c4ce422/definition_of_mitochondrial_matrix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73380e2b-54cf-4de8-ae84-cb0d30b04be7/what_genre_are_junie_b_jones_books.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/tipoxonu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3afa5b3-f64e-41a2-a953-57fc65dc32e7/why_is_feminist_literary_criticism_important.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35e91fe5-ecb2-4f42-aab3-39327bec8e62/dajolelofakolud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5dfb21f-45aa-42fb-8c9b-953b347656d9/setax.pdfIn PDF document text
    • http://besafetusupug.atwebpages.com/livro_segredos_da_cabala.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/card_college_light_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b40b4eb-70f0-4b7f-933b-cbd270212722/zebogasilikevazek.pdfIn PDF document text
    • http://limoxukuk.atwebpages.com/bangalore_bus_route_map.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_off00012fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA8 5204 bytes
SHA-256: 8b3938620c67fabf317ab30b63ad687dd114289c232021ae89e421495bc984be
font_01_sfnt_off00014186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14186 10692 bytes
SHA-256: 44b28204afa5fc046c1c1c19362221ea3d0acc573ad26e0e8d3b34b29d778a16

Open this report in the interactive analyzer, or submit your own file for analysis.