Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f8db117d9844130…

MALICIOUS

PDF

67.7 KB Created: 2021-03-21 02:29:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 8bb148934a15f8ae97968131637d0f1d SHA-1: 4733eb7f678bce1b49ada34c67bb8f9d38a187c0 SHA-256: 8f8db117d98441309fbcc0e1f79b573e031da0dd422f3d2b05076ee04b78b85f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a significant number of external links, with a critical heuristic identifying it as a PDF link farm. The embedded URLs suggest an attempt to redirect users to potentially malicious or SEO-manipulated content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/wix?keyword=inside+out+riley%2527s+first+date PDF link annotation
    • https://nifudosuv.weebly.com/uploads/1/3/4/0/134040563/b06c576.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/jeq8stv/68444292329.pdfIn PDF document text
    • https://cdn.sqhk.co/rubogomuweme/egijbhb/clockify_app_store.pdfIn PDF document text
    • http://logusubunovad.22web.org/pipefujumaxuredenipaj.pdfIn PDF document text
    • https://fefojaza.weebly.com/uploads/1/3/4/4/134480993/nepeparuxepa-vatuvanik.pdfIn PDF document text
    • https://cdn.sqhk.co/kedetofido/SXhaHo8/jilibuxegukokiziluwa.pdfIn PDF document text
    • https://cdn.sqhk.co/mareduviger/ckUPjge/gaming_wallpaper_hd_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/savadapo/1geK5Le/flange_bolt_size_chart.pdfIn PDF document text
    • https://zunodeni.weebly.com/uploads/1/3/1/0/131070331/2890404.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/9a4764b8-84ee-408f-bed8-186f6400340e/brother_mfc-j615w_ink_refill.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed5043c9-ceab-4867-a8e9-bce7af50d02e/tones_in_poems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87fc787d-3486-48d6-877a-ca49fab56d85/gamizofowagulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0fb5f42-2ed7-4e00-b289-b2e8524f4732/paint.net_fr_apple.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b591043f-25ca-482e-a6ef-e40f07223ae7/how_many_years_does_dyson_v6_battery_last.pdfIn PDF document text
    • http://babotos.epizy.com/far_from_you_tess_sharpe_vk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46e3094f-592c-47bb-b254-0d1bc92b35db/cbt_worksheets_for_depression_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5abe161-8500-4d16-ac32-b29cfb05e24c/purevpn_server_list_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d56b7b5-3b73-4b56-9c04-c16b14210f12/what_is_a_mos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2335dc01-cc9e-46bd-9b43-caedf0629adf/livuzezipanozagemixifa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/677344c4-3c2a-4dd2-912f-9114d078696a/4571211034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0994a706-df91-497c-abf6-84e338048846/what_is_ap_human_geography.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_off0000cc7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7E 4976 bytes
SHA-256: 98094d65afd27e6b6e519e6fb7659193f6be5cdce50a3413d918924c7568254d
font_01_sfnt_off0000dd87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD87 10088 bytes
SHA-256: e66784d5f7a2fb58f0d6b6eee3e591f048118c958f96a18a2694aff46fed8269

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