Malicious PDF — malware analysis report

Static analysis result for SHA-256 560337c98c7710c4…

MALICIOUS

PDF

76.2 KB Created: 2021-03-22 08:49:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f03c184530901e7288607c765e4f88f2 SHA-1: 8eeb9f6ec51c5d6597e95d8e73d33a6cbee96e9e SHA-256: 560337c98c7710c4c4e6e043978c46f519aa6bbe24bc0f390944f81adf164d60
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains and redirectors, indicating a link farm or phishing lure. ML classification and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the presence of malicious links and the PDF structure itself are indicative of an attempt to redirect users to potentially harmful content.

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://dafemum.ru/wix?keyword=dayco+belt+cross+reference+guide In PDF document text
    • http://xufopizaxeto.medianewsonline.com/pdf_to_dwg_online_converter_2020.pdfIn PDF document text
    • http://d-youtube.com/zamegoxekiroxafurn48yd.pdfIn PDF document text
    • http://musofiron.ru/stack_sheet_free_robux_roblominer17yvk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451930/normal_603d0c1f54d3d.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/TqHjbhi/clean_incubus_bass_tab.pdfIn PDF document text
    • https://cdn.sqhk.co/vameduvide/ifYBCjh/85740361171.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391008/normal_60248cd015aeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380214/normal_5fefe69fe16e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505363/normal_60354e0baff6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413978/normal_6005beca03d2f.pdfIn PDF document text
    • http://shoop-fl.ru/download_sculpt_mod_apk_traffic_riderhahdw.pdfIn PDF document text
    • http://bioforce-co.site/lange_s_handbook_of_chemistryu8g2z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458148/normal_6020a67c2ef8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406473/normal_603683228ebd2.pdfIn PDF document text
    • http://reduslimitaly.website/mogubekiteruvuv4ti28.pdfIn PDF document text
    • https://cdn.sqhk.co/modajili/0Uuo1wv/zikuxisix.pdfIn PDF document text
    • https://cdn.sqhk.co/potonefamuve/jggfgh8/luwafejosoxekekikofo.pdfIn PDF document text
    • http://gugolufixa.mywebcommunity.org/jisopuzine.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_1bfb4474710d4bd09e8cd5514a625166.pdf?index=trueIn PDF document text
    • http://nedizilunok.myartsonline.com/descargar_la_biblia_reina_valera_en_audio_gratis_en_espaol.pdfIn PDF document text
    • http://desovizipelo.onlinewebshop.net/are_fruit_gushers_bad_for_you.pdfIn PDF document text
    • https://1138278f-e8d0-45ef-aef3-dbdd7428ac52.filesusr.com/ugd/5be868_77180a2bad3241f89495a9564279a28c.pdf?index=trueIn 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_off0000e785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE785 5432 bytes
SHA-256: 9d30b59e9aa3df01e2873a125ac5bf8ba83392e2e6a746c854893b405abe7a19
font_01_sfnt_off0000fa17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA17 12552 bytes
SHA-256: 889201c2a46f85491d555d8e5c9f235b0a362cd1d2306f1f31cda91a9bb8d9e3