Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc027dc7ab947abf…

MALICIOUS

PDF

72.5 KB Created: 2021-04-09 05:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 725a6e1ec6ebded215f99f0e314dcfb4 SHA-1: f292f67be18e93286e2ed05477feff3046ec2dcd SHA-256: fc027dc7ab947abfe73a532e04187c94bddcde85528d7536ac82c41964dc96eb
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, many pointing to disposable domains, disguised under a lure about programming remote start fobs. Heuristics indicate these links lead to malicious redirector infrastructure, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature, likely involving exploitation for client execution.

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/strik?utm_term=how+to+program+new+remote+start+fob In PDF document text
    • http://timujisifatex.22web.org/ferotapades.pdfIn PDF document text
    • http://bifozitixexidad.mygamesonline.org/60682233919.pdfIn PDF document text
    • https://cdn.sqhk.co/sabiseleto/hhHjmqP/top_trending_topics_today.pdfIn PDF document text
    • http://gouliwer.online/traductor_de_espaol_ingles_gratuito3ugdw.pdfIn PDF document text
    • https://cdn.sqhk.co/zesunotu/HjehfEB/cartoon_cat_meme_generator.pdfIn PDF document text
    • https://cdn.sqhk.co/godezixibufo/UJgiid8/high_speed_racing_bike.pdfIn PDF document text
    • http://pressit.space/571464869299s3i4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447447/normal_6046bd6dcdcf9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451350/normal_5fcd51a0cd2dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445555/normal_6018e968a6b19.pdfIn PDF document text
    • http://femetorisufi.sportsontheweb.net/23931179175.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381095/normal_60011833487fb.pdfIn PDF document text
    • http://zeraseb.66ghz.com/32251916031.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/d8ff8726-f408-4e08-bb2f-eb44ef862c6b/nozowasebuzolegotif.pdfIn PDF document text
    • http://doxanoz.rf.gd/zuwelibosowitenepiguwa.pdfIn PDF document text
    • http://getetir.epizy.com/geometry_textbook_prentice_hall_answers.pdfIn PDF document text
    • http://badememaveg.rf.gd/fillable_dnd_5e_character_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64c3db09-77fd-44c0-94d7-344a352c82b2/tozawaduzuxepeziwaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/405dee4a-2df2-41da-89b2-239093c63861/32049003480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6e0d4df-fd20-4d07-912b-619a598595e3/girisigibuseruzuwulojob.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_off0000df17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF17 5380 bytes
SHA-256: 2c85933fa2951fd6bebc1a7c0cfece6f468c2af3eeba8043437facce1b8eb684
font_01_sfnt_off0000f162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF162 10324 bytes
SHA-256: 61cd00b08da87bb4dc04e2be7eeeba3ab819bc931bd498ff4f9a82d5179fba89

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