Malicious PDF — malware analysis report

Static analysis result for SHA-256 c72e0ee850cd42c8…

MALICIOUS

PDF

77.1 KB Created: 2021-01-16 16:17:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 1999e9d1c96b5d84da0f76f7aec6fa13 SHA-1: 9a866745c50771fd00e63c7386bc4356fcdacebe SHA-256: c72e0ee850cd42c88000fae1f8a1d35ef423026cf434dff1a68dbd3646da75fa
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/aws?utm_term=audio+spectrum+visualizer+android PDF link annotation
    • https://cdn.sqhk.co/wumigapinido/8gfJhcY/lusisawamiwotixobubilogi.pdfIn PDF document text
    • https://site-1174611.mozfiles.com/files/1174611/pokemon_kanto_power_collection_target.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453889/normal_5fae5c6c67b21.pdfIn PDF document text
    • https://cdn.sqhk.co/xetasenuwoji/bWAjfTG/study_guide_for_pest_control_test.pdfIn PDF document text
    • https://mabosuvix.weebly.com/uploads/1/3/4/8/134851695/palag.pdfIn PDF document text
    • https://site-1172347.mozfiles.com/files/1172347/91067372817.pdfIn PDF document text
    • https://site-1166717.mozfiles.com/files/1166717/5706173969.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390995/normal_5fac21fce6588.pdfIn PDF document text
    • https://site-1166082.mozfiles.com/files/1166082/woxigebidolulezis.pdfIn PDF document text
    • https://site-1175725.mozfiles.com/files/1175725/circle_radius_and_diameter_worksheet.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/fajixe/fefidutukegafo.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/journal_ennahar_algrie_d_aujourd_hui.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/91458493785.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_off0000ebec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEC 5320 bytes
SHA-256: 5748196084199c5dfe04d8430f56c2c36c17f4fc914e6f2880d010ff09f3b15c
font_01_sfnt_off0000fdf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF6 11820 bytes
SHA-256: 192a1ae9c6bd6dea01dabe45ef8cf151c0985aa8cf603c5277066869f8bf06e6

Open this report in the interactive analyzer, or submit your own file for analysis.