Malicious PDF — malware analysis report

Static analysis result for SHA-256 df8c559ba1efa5bb…

MALICIOUS

PDF

77.5 KB Created: 2021-02-07 16:13:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1bf1de8c8328ac341f9c047591f62708 SHA-1: d5f22d63e0c65d18c425d4f20fa40f96b9c7b2bb SHA-256: df8c559ba1efa5bb67e6e8fa7d913e10bd70c654efc1d8b84289a0aaf2002384
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wb?keyword=2019%20ceqa%20guidelines%20appendix%20g In PDF document text
    • http://itayoga.space/503269265036srix.pdfIn PDF document text
    • http://detonic-italia.website/ant_colony_optimization_matlab_code_examplew3j1t.pdfIn PDF document text
    • http://limons.space/how_to_earn_brownie_my_best_self_badge9tteb.pdfIn PDF document text
    • https://cdn.sqhk.co/jevamivuvugi/Rhdgfjf/bloons_super_monkey_2_mod_apk.pdfIn PDF document text
    • http://akvatehnika74.ru/change_din_kambi_new_song_videoofb53.pdfIn PDF document text
    • http://b0xberry.online/govuvurakalotujacpai9.pdfIn PDF document text
    • https://sojujigun.weebly.com/uploads/1/3/0/9/130969910/409838.pdfIn PDF document text
    • http://metazoaapc.fun/noxuwozuluhmugf.pdfIn PDF document text
    • http://ita-bio.fun/pimazitosuvupojuzonaki7khtc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/anniversary_day_images_free.pdfIn PDF document text
    • http://sedobuxekazadi.rf.gd/newosamexadujimipidonare.pdfIn PDF document text
    • http://lodavudomajip.epizy.com/labid.pdfIn PDF document text
    • http://zenowalu.rf.gd/35300401830.pdfIn PDF document text
    • http://jugejojejaf.epizy.com/16398433564.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/what_is_broadcast_receiver_android.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_off0000f09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09D 5728 bytes
SHA-256: e70b9e9f41aa26dce04ed85d3917cfc82194927ae7bd5e8319d1d83fc0fdf4fd
font_01_sfnt_off00010434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10434 10944 bytes
SHA-256: c97bc09ab4c56acba646c8a62c66bad3fc4e222953db982d9b8bf3b0f96f2cc4