Malicious PDF — malware analysis report

Static analysis result for SHA-256 9baa25702787644f…

MALICIOUS

PDF

83.1 KB Created: 2021-02-21 20:14:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e2ce138d158e3c175329212b7d406946 SHA-1: ca44dccfa2b72341338fda86e1465b75e837bf2d SHA-256: 9baa25702787644f67cfc8a3697829720e4485d429b1d77af071b356ac05235a
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting and employing UTM parameters, which is characteristic of phishing or spam campaigns designed to redirect users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit users through deceptive content.

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://leonvi.ru/strik?utm_term=how+long+is+eyelash+extension+course PDF link annotation
    • https://wibanakipose.weebly.com/uploads/1/3/4/3/134361509/gipufu.pdfIn PDF document text
    • https://zuvimetuna.weebly.com/uploads/1/3/5/3/135304981/raditewunuja.pdfIn PDF document text
    • https://larojebuwovu.weebly.com/uploads/1/3/1/3/131382373/tidopejita.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/o7zdjfM/58113886415.pdfIn PDF document text
    • https://vixewomofuv.weebly.com/uploads/1/3/4/6/134606761/3969073.pdfIn PDF document text
    • https://cdn.sqhk.co/xaripisi/chiggjh/battlebox_uk_reviews.pdfIn PDF document text
    • http://nimened.66ghz.com/9098762736.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503309/normal_5ff1e5bed4326.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416322/normal_5fd8202ea356c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404103/normal_601b4409f131c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467325/normal_6000930e1394a.pdfIn PDF document text
    • https://tanuroxej.weebly.com/uploads/1/3/4/1/134131309/zitesimulan.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/farowug/wifi_connected_but_no_internet_android_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/wugojovu.pdfIn PDF document text
    • http://didaduxazej.epizy.com/jolobovi.pdfIn PDF document text
    • http://xedaxabefax.rf.gd/atorvastatina_bula.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_off0001098f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098F 5284 bytes
SHA-256: e84f57712a8e6121f754584bbf5817939a1b52234e131a6bccd457aad1ebe40a
font_01_sfnt_off00011b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9E 10408 bytes
SHA-256: be480c7c075e234d050f2b2a588619753aa923af8eef2306b570962b8e39b806

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