Malicious PDF — malware analysis report

Static analysis result for SHA-256 49cb30ba20ff140a…

MALICIOUS

PDF

75.1 KB Created: 2021-04-15 04:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 391e66cc03bad13d28d6c6b6ef34168c SHA-1: bb82bcbfbd68b33053a19f722005d1ef6503a42a SHA-256: 49cb30ba20ff140a1bf5170f9d2df5a6ef2e6bc42bc279cb70458eabb32166bc
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to external websites, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery. The document body, though heavily obfuscated, appears to be a lure related to 'cleaning vacuum attachments'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=how+to+clean+vacuum+attachments PDF link annotation
    • http://dudoxanudito.scienceontheweb.net/fogak.pdfIn PDF document text
    • http://ceiling48.ru/vector_watch_lunan9eqs.pdfIn PDF document text
    • https://cdn.sqhk.co/xubewarow/b0gcL6w/57765120169.pdfIn PDF document text
    • http://ziwigosopijulal.mygamesonline.org/prodigy_autocode_talking_diabetic_meter.pdfIn PDF document text
    • http://obuv-kozha.ru/vitotetukemapuvowpuacz.pdfIn PDF document text
    • http://fadewujetenuve.mywebcommunity.org/bereziterun.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvitatutuv/JljarLh/my_digicel_app_ios.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://feelslike35.com/google_sheets_query_function_labelw6qkn.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/15975010431.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/d33hfha/fishing_life_is_good_shirts.pdfIn PDF document text
    • http://espacecmb.xyz/how_to_pass_the_ap_human_geography_examt8se9.pdfIn PDF document text
    • http://pebunoguge.mygamesonline.org/gemorekewafumelinesoti.pdfIn PDF document text
    • http://romakipojaxu.mygamesonline.org/campus_aptitude_questions_with_solutions.pdfIn PDF document text
    • http://kemutedetabu.scienceontheweb.net/15856747725.pdfIn PDF document text
    • http://krokoboko6.xyz/3879215960d461t.pdfIn PDF document text
    • https://cdn.sqhk.co/kidurukazag/lijijzV/retroarch_switch_nsp_1._7._6.pdfIn PDF document text
    • https://cdn.sqhk.co/bitubebo/2EOhOhf/lonovesidupufo.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/7a61fd00-8e6c-4480-bd0b-591bb099f445/lds_2021_youth_theme_scripture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32669b67-5f93-4f45-a332-dfb82f200de2/100_books_to_read_to_your_child.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6369d339-98f5-4a48-945d-08573cd3f578/wahl_5537n_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2f19540-2271-416c-b9a2-625fd227b633/who_are_the_two_main_characters_in_gone_with_the_wind.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_off0000e8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EA 5056 bytes
SHA-256: f1f2b50d34fc2d4021c9cd70275ce4f8d35dfae7c8e0517195cdb23edac2cd0e
font_01_sfnt_off0000fa10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA10 10416 bytes
SHA-256: a39b57217c783681473a6441c6d7175d40789fa3c1106774ed34ddc9c574434f

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