Malicious PDF — malware analysis report

Static analysis result for SHA-256 25b7aab4d17afad3…

MALICIOUS

PDF

83.3 KB Created: 2021-02-28 14:35:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6b7152617c5d9193c815a1faa5c54dfb SHA-1: d4bb554798a2c0d83b18deb540a174ac4b54c8b8 SHA-256: 25b7aab4d17afad3ff4c8317a3ed41403b215de1379520b0418700459999216e
126 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 ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and a search query, indicating a potential lure to trick users into visiting these external sites.

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://dugedepap.ru/award?keyword=pack+line+defense+basketball PDF link annotation
    • https://nodokesomizi.weebly.com/uploads/1/3/4/6/134656280/dolajesaxav_sewofubagamip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455907/normal_5fe13d8384969.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449184/normal_601ca7e7e7553.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375355/normal_5fd3dd29b67fd.pdfIn PDF document text
    • http://garanibukumom.scienceontheweb.net/feverurawota.pdfIn PDF document text
    • https://vifapuxup.weebly.com/uploads/1/3/4/0/134018045/8586997.pdfIn PDF document text
    • https://xewixubigikuj.weebly.com/uploads/1/3/4/8/134892453/178757.pdfIn PDF document text
    • http://lnstagramverificationbadge.com/jomegokegolt0qpm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413462/normal_6039956bedafe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421787/normal_5fff142cecbda.pdfIn PDF document text
    • https://gafepodaxo.weebly.com/uploads/1/3/4/6/134606739/53fda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391893/normal_5ff13891bf901.pdfIn PDF document text
    • https://fofifiso.weebly.com/uploads/1/3/4/6/134613093/wagusiler_rutamanibudik_regevusiv_wobuxateputit.pdfIn PDF document text
    • http://pusedoropeseb.66ghz.com/ma_pass_movie_full.pdfIn PDF document text
    • http://wijalejumodu.22web.org/how_to_see_all_stocks_in_nse.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392871/normal_600b4eeff0be7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zaxawogaxema.epizy.com/durostar_ds4000s_parts.pdfIn PDF document text
    • http://bilozepe.rf.gd/conceptual_framework_for_financial_reporting_ifrs_2018.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE92 4800 bytes
SHA-256: a3440195cd8c51889826f9c5ff3f32018085374c6c7bb9aaa51725ddde9d77f5
font_01_sfnt_off00010eec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEC 10080 bytes
SHA-256: f330404570ba14148e88f124358e6a846f0e94adfbd4f2f76b4ded019b2e97f8
font_02_sfnt_off0001317d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1317D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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