Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d0e159b014b4500…

MALICIOUS

PDF

78.1 KB Created: 2021-02-14 10:52:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 71ee331142bac450c9effa980d72c938 SHA-1: 50e8d93f960192b6543e3fd263cca10510485ca4 SHA-256: 3d0e159b014b45003021a7ea6e3345ab095c2be970cae0aad4bf25332db87925
156 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 multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains a large number of external links, suggesting a link farm or a phishing attempt to direct users to potentially malicious content. While no scripts were explicitly extracted, the presence of numerous external URLs and the ML classifier output strongly indicate a malicious intent, likely related to phishing 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=chaos+faction+2+all+characters PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482228/normal_5fec5092a5f3d.pdfIn PDF document text
    • https://cdn.sqhk.co/firataxoworo/jghfjar/hitman_movie_2007_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/zowolanazew/ggyBS6h/fashion_girl_dog_names_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5fe67247d2f52.pdfIn PDF document text
    • https://nefakemibozike.weebly.com/uploads/1/3/5/3/135314079/gowin-jobovoxabunof.pdfIn PDF document text
    • https://cdn.sqhk.co/tikalamin/fhcjh91/79476798824.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415326/normal_601e486bcac99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416934/normal_5fcd5449ba8d8.pdfIn PDF document text
    • https://juzudibat.weebly.com/uploads/1/3/4/3/134328144/40da362098d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455377/normal_5fe99dfcadafa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502188/normal_5fd65d7bafdbd.pdfIn PDF document text
    • https://cdn.sqhk.co/nogawevorus/r6RhcBm/pubasojedebubixidedivofaj.pdfIn PDF document text
    • https://gemujofu.weebly.com/uploads/1/3/4/3/134372819/tebudidew.pdfIn PDF document text
    • https://cdn.sqhk.co/vefomatakin/higeaij/teacher_apps_for_teaching.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/fasudikek/80655264673.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/charlie_parker_alto_sax_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/63763692071.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/76139724849.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/85291546437.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/webeb.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/78817366178.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF5 5004 bytes
SHA-256: 3d15348b3feebbe495081dc6f96bd06f36ee9d654a90e9140b8f1d9466733c18
font_01_sfnt_off0000eeee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEE 10720 bytes
SHA-256: 7ff65e13585763dacef44b63f33eff63b4f37def3a45c44ae213351eb9d93861
font_02_sfnt_off000113a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A2 16196 bytes
SHA-256: 536551dee6876366cf8a5d925709f0aaa9c9f58e9963f4e154d0e8cf77de6ee3

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