Malicious PDF — malware analysis report

Static analysis result for SHA-256 13d966c3a70a3776…

MALICIOUS

PDF

84.5 KB Created: 2021-04-02 06:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ef82b08622cd8efa4983979e2e050754 SHA-1: 4837c27c20fa31867bbc9abe09729c34d742e585 SHA-256: 13d966c3a70a3776db8ac0e699399b6fb8c388adca49a0577635b9a4a9e27b4c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominently featuring a search query for popular media, suggesting a lure to a malicious site. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text related to the embedded URL, reinforcing the lure.

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://midufefew.ru/wix?keyword=wolf+watch+season+6+episode+2+full+episode+dailymotion PDF link annotation
    • http://xokijaxano.medianewsonline.com/lactic_acid_bacteria_classification.pdfIn PDF document text
    • http://megopoveguvujal.medianewsonline.com/cahier_journal_4ap_2020.pdfIn PDF document text
    • http://rowomonug.mywebcommunity.org/xodud.pdfIn PDF document text
    • http://dasazopemobor.mywebcommunity.org/ribita.pdfIn PDF document text
    • http://fibipowokogo.sportsontheweb.net/mnemonica_download.pdfIn PDF document text
    • http://bulakirip.getenjoyment.net/ms_excel_advanced_functions.pdfIn PDF document text
    • http://xajabuzowa.scienceontheweb.net/70940686377.pdfIn PDF document text
    • http://pifedalune.medianewsonline.com/jugafijonojazemevezorovo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kewevagisugimuw.onlinewebshop.net/words_that_start_with_z_for_kids.pdfIn PDF document text
    • http://zonafikepejese.onlinewebshop.net/nptel_mathematical_physics_notes.pdfIn PDF document text
    • http://bidejepeko.onlinewebshop.net/64280837669.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/all_in_one_periodic_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/067bb36a-1645-4d2d-9af8-b52a9c4b697e/panubivasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62536920-2247-4972-a31d-958dc008e036/harry_potter_y_el_prisionero_de_azkaban_20_aniversario.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/781b1c29-3aa0-46a2-b797-4c5142ad4224/what_is_pyroclastic_density_currents.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/52726391984.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/aviva_plc_annual_report_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8a35235-653f-40a8-a503-f762bdc5e922/how_to_fill_rowenta_handheld_steamer.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/galanemebedikumisivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba510bfa-06b4-4046-bf94-6b933e0a893e/how_to_get_business_loan_from_sbi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01be00ee-ffd9-429a-a1a1-3d02697bbe36/jevoterejilotidavuxixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84fb6603-bde3-4636-ae73-f13b85291a0e/tipazuwitemabuxelawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d243f759-4b3e-41c5-b82a-3f78f31af6be/75029539083.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fb948e5-1f1a-4c2e-be19-24670fb843c1/modabowekukoj.pdfIn PDF document text
    • http://wazeniwemir.onlinewebshop.net/71875425815.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_off00010936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10936 5792 bytes
SHA-256: e4435f9b17e93f919123e7002b4967ef5e53f73da79b26c795617da262a44f42
font_01_sfnt_off00011cee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CEE 11072 bytes
SHA-256: 5e32e477e54ce16e0dd1a98accf5d7bc7f79f7e4b537d9480caf8c74e2ba218d