Malicious PDF — malware analysis report

Static analysis result for SHA-256 699f44e95ad89f76…

MALICIOUS

PDF

79.8 KB Created: 2021-03-20 16:45:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d85d5c98c3dca0f59dac5c527f7f5353 SHA-1: 7fe13a796b156d1a43e6c504c62b03b08c348d75 SHA-256: 699f44e95ad89f76da5d3b4fdceaa3350886088cf772cf6d4974569d8751e1d1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL pointing to 'druttle.ru' and a query parameter suggesting a lure related to 'Malayalam live tv channels free'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The PDF structure and embedded links are consistent with a link farm used to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=malayalam+live+tv+channels+free PDF link annotation
    • http://yozi.store/game_chocolatier_full_version_gratisfkljn.pdfIn PDF document text
    • http://xaninivinekeni.iblogger.org/6402586734.pdfIn PDF document text
    • http://fupodiruza.66ghz.com/88968533433.pdfIn PDF document text
    • http://copyright-rules-help.com/abi_yo_yo_songleec7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444370/normal_5fffb3ca79a18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485929/normal_604f8ee771699.pdfIn PDF document text
    • http://br1.red/a_world_of_ideas_10th_edition_online2l0ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420018/normal_60197d5877e2e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cec3132b-70e0-4d33-8c2e-19f2defcbdfc/super_bass_bluetooth_mini_tf_portable_speaker_-_full_metal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/481736ad-0f49-4b51-b303-bed3145c377e/gta_v_3dm_crack_v4_download.pdfIn PDF document text
    • http://deseruti.rf.gd/obstructive_sleep_apnea_patient_education.pdfIn PDF document text
    • http://fesamemosonug.rf.gd/69140320440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd11231d-2836-42a9-82f2-509ce3f7e53f/97146893867.pdfIn PDF document text
    • http://jalugegaru.epizy.com/tilavadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/231906f9-d69b-4fee-8305-b3eb7daadd2c/24154339759.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06053e50-220e-4655-aa24-f1028c2cd307/ever_be_on_my_lips_chords_easy.pdfIn PDF document text
    • http://rejinivak.rf.gd/56105379993.pdfIn PDF document text
    • http://latilofu.rf.gd/modal_confirm_dialog_on_form_submit_bootstrap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37be1a2a-beb5-4505-9d94-4ff24b57c3a1/what_is_a_good_ice_breaker_for_a_meeting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b00aa1ed-b288-41e8-ae17-97c91a4a3827/wetifodamotoru.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_off0000f989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF989 5288 bytes
SHA-256: f813ae6cf930cb272a945dec5253c668a995dba2e6ee1604a6b8eb5441ae4a57
font_01_sfnt_off00010b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B76 11372 bytes
SHA-256: 3610b27d035547161b19652bcdd50ded881570a4d6eea21113266a3a3d08a616

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