Malicious PDF — malware analysis report

Static analysis result for SHA-256 c807786d3f0ed9c5…

MALICIOUS

PDF

79.0 KB Created: 2021-02-26 06:52:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 00da54376e6f213af31f3a9b4393ac00 SHA-1: c6e077bac0a00d8bb39c9bb42650aa8187ed77c5 SHA-256: c807786d3f0ed9c5e2df1f5109878653ef20d22bf061cf824669f3e1372f4d63
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure and a machine learning model indicating high maliciousness. The document contains numerous embedded URLs, many of which point to disposable hosting, suggesting a link farm designed to distribute malware or conduct phishing. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate a phishing or redirection attack.

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
  • 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://crophysi.ru/123?utm_term=cobra+29+nw+ltd+classic+peak+and+tune In PDF document text
    • https://cdn.sqhk.co/pugirunosamo/ihjjbhf/43671776575.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417037/normal_600fa4af614e5.pdfIn PDF document text
    • http://dazogefase.22web.org/is_the_g_shock_rangeman_worth_it.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414680/normal_5fc79172cbaba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417998/normal_5fcc316668240.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420924/normal_5fe6fed20efae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375199/normal_5feb0cecdb697.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383450/normal_5fc898afcc99a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413696/normal_5fdd37f56c0d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451932/normal_5fe8ae73a0c29.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://winulinimax.rf.gd/dixiwibib.pdfIn PDF document text
    • http://tijiwef.epizy.com/cocubes_aptitude_questions_and_answers_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/bhai_bhai_old_movie.pdfIn PDF document text
    • http://sixuregorajaso.rf.gd/what_to_bake_in_mini_bundt_pans.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/81888554372.pdfIn PDF document text
    • http://faxanudof.epizy.com/28942209928.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/55760140300.pdfIn PDF document text
    • http://jufakoxageponuz.rf.gd/godilixet.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/4851713061.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_off0000f534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF534 5556 bytes
SHA-256: a1c11b0088ada5b4c02a446897b5e05f7026ee622ad772275c5f788f28a6d158
font_01_sfnt_off0001082d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082D 11172 bytes
SHA-256: d35b7af72ef5e7b201a126f217f17122988dd74d62b36a3c5d4b4cd3088a7e7a

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