Malicious PDF — malware analysis report

Static analysis result for SHA-256 740364e94efdd963…

MALICIOUS

PDF

79.4 KB Created: 2021-03-06 12:16:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: b210fe84d73a299b185eb370e6e5c1ce SHA-1: 24e0a08302bcfbb7b1b01a4d85d4cfeb5849cd2c SHA-256: 740364e94efdd96364584b157b23a9ba48ef889bd5a9247ac4c0a09b888b7466
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful sites.

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://nipisod.ru/strik?utm_term=samsung+tv+sound+output+optical PDF link annotation
    • https://cdn.sqhk.co/wujozuzewed/aFAagjC/hd_movies_2020_free_movies_download.pdfIn PDF document text
    • https://dasovarelebeji.weebly.com/uploads/1/3/4/7/134712834/bigaroxogi.pdfIn PDF document text
    • http://tesocoin.online/calculadora_de_iva_retenido_sat33zl9.pdfIn PDF document text
    • http://pay-order.info/burger_king_menu_specials_and_prices65jlh.pdfIn PDF document text
    • http://grizhoff.ru/how_to_zoom_out_in_slitherio4fncq.pdfIn PDF document text
    • https://pikotawikeju.weebly.com/uploads/1/3/4/4/134496208/3308559.pdfIn PDF document text
    • https://lepamatizetu.weebly.com/uploads/1/3/0/7/130739269/6743692.pdfIn PDF document text
    • http://drnextact.xyz/the_night_before_christmas_hardcover_books6n1l.pdfIn PDF document text
    • https://nunibuzobaga.weebly.com/uploads/1/3/0/7/130740367/d0fba1.pdfIn PDF document text
    • http://all-system7.work/19680077342bkdc0.pdfIn PDF document text
    • https://cdn.sqhk.co/nimuxugemu/Xgiicih/68493490379.pdfIn PDF document text
    • http://cardioactiveuficiale.site/27827659853dvum0.pdfIn PDF document text
    • http://probnik1313.tech/362305837125heep.pdfIn PDF document text
    • http://wiwuwanulujero.iblogger.org/get_your_guide_discount_code_amsterdam.pdfIn PDF document text
    • https://cdn.sqhk.co/lokiwejawe/dohaLWo/cute_cat_mobile_wallpaper_download.pdfIn PDF document text
    • http://tebiweja.iblogger.org/57534137510.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c37a6a7-2e9f-406f-8165-238e57c38928/11157277307.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/946849fb-6733-497b-ae96-3f11bb994b01/safebij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b47d1f9d-3c48-4128-9cc6-7e91dc16f5d1/vepoletogebinejobopojolow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90060cb8-4122-4ac9-a244-cd8445d2e11e/fake_book_covers_generator.pdfIn PDF document text
    • http://zilajisalogu.epizy.com/how_to_use_a_weighted_blanket_properly.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_off0000f7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BB 5460 bytes
SHA-256: 162059ac600ddf2e1df3e0136ddfdaa1a4a2e31608633bfd94d101aeb796a466
font_01_sfnt_off00010a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4B 11080 bytes
SHA-256: c67a3f43c2aa988e3a31707eeecccfdada8b3355430b870eb7da7b9e7504302c

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