Malicious PDF — malware analysis report

Static analysis result for SHA-256 078ddc6330f6abf6…

MALICIOUS

PDF

85.1 KB Created: 2021-03-22 23:10:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1b7e44f0f56460dd8fe3a7386bd4b026 SHA-1: e38717b85561aa73e877eac18310ffb235aa893f SHA-256: 078ddc6330f6abf65c0fc148e6cfaf0b0ea89035135feeb5ce9632157384cf6f
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 malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious infrastructure.

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
  • 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://crophysi.ru/123?utm_term=chitralahari+songs++2018 In PDF document text
    • https://cdn.sqhk.co/ruradavi/iOjiZ4y/bubble_pop_bubble_shooter_pop_bunny.pdfIn PDF document text
    • http://prodson.fun/how_to_write_legal_letter_to_clientsqvsd.pdfIn PDF document text
    • http://afracheat8.xyz/percy_jackson_and_the_battle_of_the_labyrinth_read_online5fqhp.pdfIn PDF document text
    • http://tryporte.xyz/xalebamobepobisignn0u5.pdfIn PDF document text
    • http://instapresent.site/rituzerufinozok23ngu.pdfIn PDF document text
    • https://cdn.sqhk.co/jezuleku/qwPijic/dr_reverson_gastro_rio_verde.pdfIn PDF document text
    • http://topplafond.xyz/free_navigation_apps_for_android5l0ny.pdfIn PDF document text
    • http://pearhaidhr.fun/adventist_church_logo_freem5fmc.pdfIn PDF document text
    • http://gratoramaa.website/lisatinusavawojexuto1e4j.pdfIn PDF document text
    • http://mon-cmso.best/ziderafasukam1xril.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c998fa6-d128-447d-af53-01c28f1e1d6b/how_to_connect_sony_soundbar_ht-ct290.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34c5c5e6-45ec-4336-aa3e-98b9cd69fdd2/numerical_recipes_in_fortran_77_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff9bc3fa-46a6-4430-a943-cb52cfb67ef9/95414600601.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/989d571e-f89b-4e4b-b482-4778a4e8ca3b/new_batman_graphic_novels_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24c3195a-9fda-47be-b271-54515880c86f/glock_19_gen_4_trigger_lock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8baffdbb-7a7f-403e-bcf9-9d08b648c960/karasigufotenunudop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58518e91-8495-47e4-be41-3d494bf33d4a/87356430547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cef8116-ed9e-4eef-9dac-1631359a2ff4/vejesirixetezovivaleve.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BA 5372 bytes
SHA-256: 4809244b77da0435d22743bdd9f65341dac6fb7e1a0218051656327fe850394b
font_01_sfnt_off0000f6e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E8 6508 bytes
SHA-256: ec9a42e71fceb32351072338082dec85b5b6ed9696940abef7f88da6e506d4b6
font_02_sfnt_off00010bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF8 10856 bytes
SHA-256: 203a5b419717154084a48d90cd6881f7143053441d0a75533ec87115340c2f69
font_03_sfnt_off0001319f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1319F 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8