Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4c0e21f0604f131…

MALICIOUS

PDF

91.2 KB Created: 2021-03-27 11:08:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 53862e3572c362d0166c9ebc05b3287a SHA-1: bf55afae67cc4acefaebdd8f71d06f4103ea0e5b SHA-256: e4c0e21f0604f131a0951a6cd7b2881fe68c5d611239cb8cbc8dff86a0a0d8eb
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with a primary suspicious URL pointing to a domain associated with a link farm and UTM parameters, suggesting a phishing lure. The PDF structure and embedded content, though heavily obfuscated, are indicative of a malicious document designed to redirect users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://mezovuduw.ru/strik?utm_term=dr+jekyll+and+mr+hyde+book+pages PDF link annotation
    • http://devgame.design/namipedotew8lt5q.pdfIn PDF document text
    • http://rameautbxy.space/how_to_use_timer_on_g_shockzx4f6.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/3jDhdhl/police_siren_sound_download_mp3_free.pdfIn PDF document text
    • http://ranking-se.com/filaloribovezikejo9pq8z.pdfIn PDF document text
    • http://axecheat6.xyz/jikebusaxipetiy7fng.pdfIn PDF document text
    • https://cdn.sqhk.co/fixuzigetir/4gdibjc/22617336923.pdfIn PDF document text
    • http://stickerrus.ru/french_accordion_musicwdfc6.pdfIn PDF document text
    • https://cdn.sqhk.co/dajuzafum/gOjcOie/25300952869.pdfIn PDF document text
    • https://fezagigix.weebly.com/uploads/1/3/0/8/130813643/jurati.pdfIn PDF document text
    • http://rawitotizoxuk.scienceontheweb.net/grammar_games_and_activities_2.pdfIn PDF document text
    • https://duvigenusidila.weebly.com/uploads/1/3/4/7/134736387/javabozamalubarike.pdfIn PDF document text
    • https://cdn.sqhk.co/kupodakojav/ifCjeih/28735455221.pdfIn PDF document text
    • http://mmmmmme.space/cushman_wakefield_industrial_market_reporttkgi8.pdfIn PDF document text
    • http://agreevudb.rest/adb_install_apk_failure_install_failed_no_matching_abisubo32.pdfIn PDF document text
    • https://xobugozo.weebly.com/uploads/1/3/0/7/130739897/62d9b700e49.pdfIn PDF document text
    • http://shop-onlinediscount.xyz/gurotonobarefeboref6gxu.pdfIn PDF document text
    • https://cdn.sqhk.co/sufajezugi/egieB7X/free_fact_or_opinion_worksheets.pdfIn PDF document text
    • http://theboldpantsproject.com/nanozedibozilsbuhi.pdfIn PDF document text
    • http://leomannapov.com/xezitakarevirekuyfvui.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/11206565226.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kikanelomer.onlinewebshop.net/cours_sur_les_filtres_analogiques.pdfIn PDF document text
    • https://b2bd4247-5771-4f9a-9f3f-b46500bff287.filesusr.com/ugd/f41bfe_8d29d8a934c44c12a42cc8077e634f46.pdf?index=trueIn PDF document text
    • https://50037ee0-0691-4a53-bdc2-b2f8f795cfa6.filesusr.com/ugd/b41a9a_06317a2396e34d0d917a1508e6aa118a.pdf?index=trueIn PDF document text
    • https://a8fdb364-3865-4521-a36b-e12f4de7752f.filesusr.com/ugd/e20637_287feed43622486493f4249447e510bc.pdf?index=trueIn PDF document text
    • https://01d67eed-50ba-4ccb-8f82-c1581f7ed07e.filesusr.com/ugd/e3325f_3ca335b72d4d43bfa83b5d2ffaaf72f2.pdf?index=trueIn PDF document text
    • http://xipanizi.myartsonline.com/how_to_fix_insinkerator_garbage_disposal.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_off000124bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124BC 5752 bytes
SHA-256: 0ca71c567df7f020b1d98efa4a8ce46b10b344a08ff235f50bc34c4a3e01dc3b
font_01_sfnt_off0001383e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1383E 11772 bytes
SHA-256: 58cb2c9edd56c80ad3b4c81b9c68e6f76cbca7a6ef3add733ce35063ccfc019c

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