Malicious PDF — malware analysis report

Static analysis result for SHA-256 268cc45447153aa4…

MALICIOUS

PDF

67.2 KB Created: 2021-02-12 03:18:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0d6a0ce114a9556e0fe49620f7961c59 SHA-1: ec5b0545feba2e72f1433eb6a8eec4afb36d95f1 SHA-256: 268cc45447153aa402485c7ddbe5fffaf1ed2b3c87bc0f0d6c468ab91843fc85
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, likely leveraging embedded JavaScript for redirection or exploitation.

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/123?utm_term=honolulu%25E2%2580%2599s+caf%25C3%25A9+8+%25C2%25BD PDF link annotation
    • https://cdn.sqhk.co/berovanova/Thjcjc9/84448216016.pdfIn PDF document text
    • http://naturalik.fun/dozobiraouz3.pdfIn PDF document text
    • http://uaportal.site/abba_knowing_me_knowing_you_sheet_music31283.pdfIn PDF document text
    • https://cdn.sqhk.co/dodipenameki/Rb1tsjg/egg_wars_server_minecraft_download.pdfIn PDF document text
    • http://robinmani.site/zutojvlnz5.pdfIn PDF document text
    • https://pamuguvijokogag.weebly.com/uploads/1/3/4/8/134883264/jimure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481273/normal_601dbd91c8fee.pdfIn PDF document text
    • https://fitovixuzo.weebly.com/uploads/1/3/1/3/131380078/6367497.pdfIn PDF document text
    • http://idealslimitalia-oficial.site/lace_up_platform_booties_forever_21rx3lm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379491/normal_5fe1a9f1184f9.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
    • https://s3.amazonaws.com/nojemi/80601904133.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/nunuzazijoxaf.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/fikizovozelufexubakegevu.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_off0000bd91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD91 4920 bytes
SHA-256: b88406ff8418392a04ca104b844fa36f8cfcb5cd64033689e3350ef5ba9b8360
font_01_sfnt_off0000ce6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6F 9968 bytes
SHA-256: d5f14019b6f4826e402041430c6fe629825878e28e93b08b1f30053a88b52ddc
font_02_sfnt_off0000f03b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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