Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada2008aeeab5ccd…

MALICIOUS

PDF

92.5 KB Created: 2021-03-02 00:46:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1b1409eab797888f83d600a15ff98bac SHA-1: 22c950f1289c56b195b02973471b3b3ed73d359f SHA-256: ada2008aeeab5ccd35d2f519720332508c305581b3de96cf519c04b527e53844
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to obscure the true destination by using link farms and UTM parameters, suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs strongly suggest it's designed to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/strik?utm_term=3rd+grade+math+free+worksheets+fractions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369174/normal_603d6d25d8861.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410414/normal_5fcf16c13d450.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/acer_aspire_e15_keyboard_price_in_sri_lanka.pdfIn PDF document text
    • http://wijuviniwak.iblogger.org/behind_closed_doors_book_summary_spoiler.pdfIn PDF document text
    • http://pevojatinolotej.22web.org/what_does_vegans_eat_for_dinner.pdfIn PDF document text
    • http://xazufajemexeb.22web.org/what_is_intermediate_equivalent_to.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/cpiatK9/89042297484.pdfIn PDF document text
    • http://wevesapawuzu.22web.org/michelin_guide_france_2019_in_english.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490736/normal_5fd138126d605.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485004/normal_603996cdade1f.pdfIn PDF document text
    • https://nokaxogu.weebly.com/uploads/1/3/4/5/134520383/926ed68f3c9.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://tizebowikono.rf.gd/58072014923.pdfIn PDF document text
    • http://sipanokule.onlinewebshop.net/16432663159.pdfIn PDF document text
    • http://varudejeb.epizy.com/rulekelavekaxulosijalavo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA0 5416 bytes
SHA-256: 62e4fabd94e722a34d7d94378bb0a6f28117ade7a3fcdd19d1e66784f1e189bd
font_01_sfnt_off00011cf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF1 10468 bytes
SHA-256: c69a06cf99c28786209785d8fee052cba02b1abe3aa1fa5b6d0fb874ac72b91f
font_02_sfnt_off000140f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140F6 16176 bytes
SHA-256: 423a95f51e0e1478e9faedb0fbe9194f83470cf0733ac5785755799148eb902f
font_03_sfnt_off00015622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15622 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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