Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8fd427c6d32933c…

MALICIOUS

PDF

66.3 KB Created: 2021-03-20 17:54:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 29d80510689fb9d200f2ba24b9267954 SHA-1: 77e5ea53be4764611a90379c0482248708528104 SHA-256: e8fd427c6d32933cc10eadf57c7a71376b6f839a32991c5e69e346a551edab46
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to dafemum.ru. ML classification and ClamAV also flagged this file as malicious. While no scripts were explicitly extracted, the presence of a malicious URL strongly suggests an attempt to lure the user to a compromised site, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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=ucla+faculty+center+renovation In PDF document text
    • https://cdn.sqhk.co/niminililez/ij7ifwV/65827192931.pdfIn PDF document text
    • http://towonededuv.medianewsonline.com/31769239957.pdfIn PDF document text
    • http://tublitalia.fun/67774707720euafg.pdfIn PDF document text
    • http://gebikomuxe.getenjoyment.net/advantages_of_private_limited_company.pdfIn PDF document text
    • https://cdn.sqhk.co/jofijoju/fherfjh/kulla_agent_000_kannada_songs_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373797/normal_604b972f55f4a.pdfIn PDF document text
    • http://lesagotefawa.22web.org/24375873370.pdfIn PDF document text
    • http://5coupon.info/google_maps_api_key_free_for_testing0h3jd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470400/normal_603d1c5ee5560.pdfIn PDF document text
    • http://perevozka.ru/dimonunafolotape36w0k.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/dewutexorob/18857806501.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/javascript_append_stylesheet_to_head.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/steam_market_tax_form.pdfIn PDF document text
    • http://dawejur.atwebpages.com/takuvozuziwomepo.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/pelunitemadafezolu.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/what_are_the_4_major_types_of_conflict.pdfIn PDF document text
    • http://nimetegukixiz.rf.gd/kexaweges.pdfIn PDF document text
    • http://gatoruvizuzil.epizy.com/55911141903.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_off0000ca6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA6D 4848 bytes
SHA-256: 88fd211440d7230e9fc6e4ee8b4d78253e477f6531b7a8d88b6d15ca65c82d88
font_01_sfnt_off0000db11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB11 9592 bytes
SHA-256: 5daa6b7e1644ce8e5141b09aed102c73f637e0fa82ce4e3de89ac544c96c05b3

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