Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8d8fbf12ca260f5…

MALICIOUS

PDF

86.4 KB Created: 2021-03-20 19:09:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: bc440d030e9b4cd9ef806185950b5ed5 SHA-1: 19d1b180cbc1a6fa7dd01d84e742fd2b8e371e0e SHA-256: c8d8fbf12ca260f5e1eeabf7f39c66669ce5f4b203fe28cacf71128a29581ac9
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and contains external URIs pointing to potentially malicious domains. The PDF structure suggests it's a link farm designed to redirect users, consistent with phishing or malware distribution tactics. No scripts were extracted, but the presence of external links indicates an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/wix?keyword=%25D0%25B3%25D0%25B5%25D0%25BD%25D0%25B5%25D1%2580%25D0%25B0%25D1%2582%25D0%25BE%25D1%2580+%25D0%25BA%25D1%2580%25D0%25B5%25D0%25B4%25D0%25B8%25D1%2582%25D0%25BD%25D1%258B%25D1%2585+%25D0%25BA%25D0%25B0%25D1%2580%25D1%2582+%25D1%2581+%25D0%25B8%25D0%25BC%25D0%25B5%25D0%25BD%25D0%25B5%25D0%25BC+%25D0%25B8+%25D0%25B0%25D0%25B4%25D1%2580%25D0%25B5%25D1%2581%25D0%25BE%25D0%25BC PDF link annotation
    • http://xelibirujegid.mywebcommunity.org/kung_fury_hackerman_t_shirt.pdfIn PDF document text
    • http://lagutobokoza.22web.org/belkin_n600_setup.pdfIn PDF document text
    • https://cdn.sqhk.co/modajili/ihhRM0g/rolling_stones_gimme_shelter_full_album.pdfIn PDF document text
    • http://lixidavek.22web.org/54008843416.pdfIn PDF document text
    • https://cdn.sqhk.co/miropefaneka/hCmqmIP/27055086748.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/grade_7_maths_exam_papers_south_africa.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/should_internet_be_capitalized.pdfIn PDF document text
    • http://walolexokesufa.sportsontheweb.net/wodefobolepew.pdfIn PDF document text
    • http://kotudekudoges.getenjoyment.net/twilight_full_movie_in_hindi_free_download_720p.pdfIn PDF document text
    • https://cdn.sqhk.co/dedikunakudu/Enghjfp/wedatibolev.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/YQwXnje/fisoxekadufowabowamuvejov.pdfIn PDF document text
    • http://dupuladusudired.mypressonline.com/what_is_the_best_50_gallon_gas_water_heater.pdfIn PDF document text
    • http://pawedipavixet.22web.org/bible_verse_for_beginning_of_school_year.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xufoziminep.onlinewebshop.net/free_autobiography_of_a_yogi.pdfIn PDF document text
    • http://tirixerunifadi.rf.gd/7th_grade_algebra_worksheets_with_answer_key.pdfIn PDF document text
    • http://larujuzo.rf.gd/suzuki_drz_400_s_service_manual.pdfIn PDF document text
    • http://wepatimaleb.epizy.com/angelica_liddell_la_casa_de_la_fuerza.pdfIn PDF document text
    • http://tasopawak.rf.gd/91318552129.pdfIn PDF document text
    • http://poramukuwulaji.epizy.com/reading_comprehension_worksheets_1st_grade_free.pdfIn PDF document text
    • http://zedofaxuboz.onlinewebshop.net/vukebajavudomabosi.pdfIn PDF document text
    • http://zepizevut.atwebpages.com/mapamundi_con_nombres.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB6 5408 bytes
SHA-256: eee852cb3b1199af7203ad05123a91d1c0757ce12317a6e4cc5230f72e7a7894
font_01_sfnt_off00010fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBE 10144 bytes
SHA-256: 973252ed57245b27233844dce5bf590ae853118c65c21831af0a3a2dd851550e
font_02_sfnt_off000132b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B4 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15