Malicious PDF — malware analysis report

Static analysis result for SHA-256 eebe48749ec4b8e1…

MALICIOUS

PDF

84.0 KB Created: 2021-03-05 23:16:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: feff1a867d1c4e9712479fd6539ff516 SHA-1: 72e576e102f6a67220fceb47916ad0c1c877d9d7 SHA-256: eebe48749ec4b8e19993fb046ea7c5aaba24300ac5a2d5f0ab8459ed3fa3497e
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of 'utm_term' parameters in some URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further support a phishing or malware distribution scheme.

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 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://ponafet.ru/strik?utm_term=tipos+de+redes+de+comunicaciones+industriales PDF link annotation
    • https://jumirusuvowelu.weebly.com/uploads/1/3/4/6/134632856/kemaraniveru.pdfIn PDF document text
    • http://wazepewazivulil.mywebcommunity.org/sopofutu.pdfIn PDF document text
    • http://timinome.getenjoyment.net/12373967133.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/9hZo7ef/funfair_ride_simulator_4_apk_android.pdfIn PDF document text
    • https://cdn.sqhk.co/belebudetub/ibgfggt/33948633063.pdfIn PDF document text
    • http://mudixefibewab.mywebcommunity.org/marvel_movies_in_order_to_watch_avengers_endgame.pdfIn PDF document text
    • https://cdn.sqhk.co/zebimapajod/bhfil3C/twilight_struggle_board_game_rules.pdfIn PDF document text
    • https://zuzivosojix.weebly.com/uploads/1/3/0/7/130775151/982d38c5f.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/hhe3gi6/16202444783.pdfIn PDF document text
    • https://noxerurivago.weebly.com/uploads/1/3/4/7/134767941/pugopefita_penulokuxu.pdfIn PDF document text
    • http://lirinevewafa.mypressonline.com/how_much_does_it_cost_to_learn_autocad.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/8b3fae52-bce6-44ba-8d4f-9da8023029a1/pakelibenej.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/kannada_feeling_video_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/cbse_improvement_exam_2019_form_filling_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26320efd-de7a-4272-a6da-bd3d6beaa754/browning_auto_5.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/pisalixebufufo.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/21351886798.pdfIn PDF document text
    • https://0d3c4653-ec4b-4b04-9c20-59e348ba858e.filesusr.com/ugd/62200f_49e10bb341b74c45bd9b1f4d28ea5266.pdf?index=trueIn PDF document text
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_0c7de63545c347e7ae371b9a5973b7dd.pdf?index=trueIn PDF document text
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_15fb04e15001491f9b4a8f64c2cc5bf7.pdf?index=trueIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_bc678ddb1c4145b2a65356101ffaa754.pdf?index=trueIn 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_off00010b17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B17 5168 bytes
SHA-256: 8ad0037dd39fa8d3a0d680bfd78befaa007bc68b674857f83482a0e281c07471
font_01_sfnt_off00011c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C87 11112 bytes
SHA-256: a405518bce092f19a673544d349c02c447b8b9f4645419265f540667eff66934

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