Malicious PDF — malware analysis report

Static analysis result for SHA-256 4200ded5366adbc2…

MALICIOUS

PDF

79.0 KB Created: 2021-03-24 12:40:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f406422f2adb2f1a29a91af42117b80e SHA-1: b5bf0376eac41f1f25bc41f5e71becccb2c8bd39 SHA-256: 4200ded5366adbc29a6098361fb9a8b7be8cc4de6902e1cfaa614a7134024f48
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 external links, many pointing to disposable domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of many unknown reputation URLs strongly indicate malicious intent. Although no scripts were extracted, the overall structure and URL distribution align with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://xajibur.ru/award?keyword=auto+electrician+job+description+pdf PDF link annotation
    • http://petrol-v-pol-price.site/32714692087q1v3l.pdfIn PDF document text
    • http://tuimag.ru/9th_grade_texas_biology_textbook_online1uvu1.pdfIn PDF document text
    • http://jemulobapamiwu.mywebcommunity.org/21963775196.pdfIn PDF document text
    • http://italywow.info/ronovosipasomedyvova.pdfIn PDF document text
    • http://carins.info/bm_hunter_dps_buildk65il.pdfIn PDF document text
    • http://indital.fun/wukeditoxilovffar.pdfIn PDF document text
    • http://trelon.fun/how_to_sharpen_stihl_ms170_chainsaweszs8.pdfIn PDF document text
    • http://rakapugijumub.sportsontheweb.net/cours_access_bars.pdfIn PDF document text
    • http://slmit.space/booster_apk_xdakns6f.pdfIn PDF document text
    • http://normal-id.com/what_is_the_role_of_social_studies_in_nation_buildingzl64u.pdfIn PDF document text
    • http://itawomen.fun/5_relationships_of_confucianismlea3i.pdfIn PDF document text
    • http://itdiscounts.info/mini_games_for_pc_windows_10_free_downloadpk4on.pdfIn PDF document text
    • http://reestr.site/comtrend_ar-5381u_setupjola0.pdfIn PDF document text
    • http://antonioit.fun/nizesww9ht.pdfIn PDF document text
    • http://tiziwosujo.22web.org/dark_souls_save_game_editor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fijukarevi.epizy.com/que_es_lo_que_lleva_un_proyecto_de_investigacion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90bc3c95-caa7-4ef8-84ce-822dcda0155b/83879044006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ca51060-841b-4336-92f8-7fa403cdf9d8/japowepifaval.pdfIn PDF document text
    • http://dogiwexor.myartsonline.com/xerevexidelalidutiw.pdfIn PDF document text
    • http://nekeromufuribel.rf.gd/totevujeb.pdfIn PDF document text
    • http://gevejonitu.onlinewebshop.net/elgato_hd60_s_capture_card_setup.pdfIn PDF document text
    • http://lewomunenuvi.myartsonline.com/41071655143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b7f0796-a0e9-4dfa-9775-e5edf8863006/64595343705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87585459-5199-4b1c-9848-4217d87f1b58/line_6_spider_jam_75w_review.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA62 5236 bytes
SHA-256: 5702aacbfc9c1c62f6337eef03244cac6d8bccd4d29390ed4f5cf298bc256a17
font_01_sfnt_off0000fc31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC31 10676 bytes
SHA-256: f0543a9787da24583c3ebc3937474d9b15e8822e60217d15aff25459963ea7a5
font_02_sfnt_off00012071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12071 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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