Malicious PDF — malware analysis report

Static analysis result for SHA-256 b95fe85ba73cced5…

MALICIOUS

PDF

76.0 KB Created: 2021-03-02 20:58:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a62634206df50bf390db064c676be4be SHA-1: 96d080c259bf8c12b89e634ab191956a8927cfd9 SHA-256: b95fe85ba73cced53e06a3eed051c42f42bb8961f5e17ac8c30cecc876ecbb8f
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The presence of external URIs and the 'link farm' heuristic strongly suggest the document's purpose is to redirect users to malicious sites or download further payloads.

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://golowaki.ru/award?keyword=how+to+make+a+specular+map PDF link annotation
    • https://cdn.sqhk.co/mivesumor/CU8qifS/electrical_circuit_design_software_free_download.pdfIn PDF document text
    • http://nenonazuf.scienceontheweb.net/introduction_to_linear_regression_analysis_5th_edition_free.pdfIn PDF document text
    • https://cdn.sqhk.co/momebuman/ijentia/99842668153.pdfIn PDF document text
    • https://cdn.sqhk.co/lukapokobejo/Ijciaic/dogfight_1942_wiki.pdfIn PDF document text
    • http://lnstagramverificationbadge.com/basic_korean_language_tutorialki9qx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446016/normal_6035bd8bd60fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459468/normal_60247331b5b7e.pdfIn PDF document text
    • http://dasiwujupuna.sportsontheweb.net/43588258944.pdfIn PDF document text
    • http://bekopomulasebi.getenjoyment.net/have_diamonds_increased_in_value.pdfIn PDF document text
    • http://tehnotop.space/bopinazumeputotujly1n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487409/normal_602e60c158d91.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/H0gjHhh/69998392416.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/chc71gi/survivor_adventure_survival_island_pro_free.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/genukopapovixo/45380968534.pdfIn PDF document text
    • http://zirutabu.myartsonline.com/nejogojedifolasavuru.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_off0000ee8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8F 5196 bytes
SHA-256: c881b117220a14333c37068ebf5e96126cc6d48b4a7bd6e780aa58d304e48fee
font_01_sfnt_off00010032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10032 10148 bytes
SHA-256: 6b89eaca977c6288f90ea29897a3c36d487425988bd0fd76ad0b602dc21f5aff

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