Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c8580fa3736ecf…

MALICIOUS

PDF

77.6 KB Created: 2021-02-25 05:48:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 14976844b51a3c8dc4a0057b4b532f3b SHA-1: 42289a18a33a15e954c6cbc0b1710e6dc26ead2f SHA-256: 62c8580fa3736ecfbd2605c316565ad3e5fde500546a202d4fa17dc88d1047a5
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with at least one identified as a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier 'ML_NYX_PDF_MALICIOUS' strongly indicate malicious intent. The document likely serves as a lure to direct users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=princess+and+the+frog In PDF document text
    • https://cdn.sqhk.co/putuziboki/fgj8jdC/devulizekexolibikupota.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/w2gjCgg/diy_balloon_arch_without_helium.pdfIn PDF document text
    • https://cdn.sqhk.co/joxipadij/hcgdrOh/vijavugubeluminosolawe.pdfIn PDF document text
    • http://vazutiz.iblogger.org/dukibokipo.pdfIn PDF document text
    • https://cdn.sqhk.co/xeposetuge/YesiJ3t/losoramuxojepaza.pdfIn PDF document text
    • http://exampl1214.com/scope_of_work_sample_templateja5t0.pdfIn PDF document text
    • http://bubble1.space/99508963552p73yw.pdfIn PDF document text
    • http://togurebuk.66ghz.com/54887370460.pdfIn PDF document text
    • http://sujabupinoda.scienceontheweb.net/60693234946.pdfIn PDF document text
    • https://cdn.sqhk.co/pofadugilip/hhifib8/colossal_cave_adventure_game.pdfIn PDF document text
    • http://acupofjacob.com/naxudopj010b.pdfIn PDF document text
    • http://lunatan.medianewsonline.com/42463994732.pdfIn PDF document text
    • http://sipataj.sportsontheweb.net/2015_maserati_granturismo_convertible_mc_centennial.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/iaQieYO/31548692769.pdfIn PDF document text
    • http://abanca-electronica.com/tedakukogafekarof2091n.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/ujjNMZy/34706468956.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/can_i_use_a_bluetooth_keyboard_with_my_samsung_galaxy_tab_10.1.pdfIn PDF document text
    • http://meetlait.pro/what_are_the_components_of_a_newspaper_article5qqkr.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/47644601825.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sutexuvidag.myartsonline.com/how_to_find_the_wps_pin_on_my_dell_printer.pdfIn PDF document text
    • http://ramimivojis.rf.gd/zexemomu.pdfIn PDF document text
    • http://navasegekukuj.epizy.com/exercice_corrig_centre_de_gravit.pdfIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/how_do_i_track_a_usps_certified_mail.pdfIn PDF document text
    • http://tixinova.rf.gd/85283832973.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_off0000f33f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33F 5252 bytes
SHA-256: 5bdade3f5ef412ae7b5577554cdb1021134a78188a9a1acc70bbb234362b057a
font_01_sfnt_off0001051a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051A 10728 bytes
SHA-256: 75c8107766a81b705ba58cc759c71c6ce3c173c58bf9fa8c9284cd881e523956

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