Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9e565ad97d5811b…

MALICIOUS

PDF

80.7 KB Created: 2021-05-15 16:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1b4c02928bd53555902aab40d14e987e SHA-1: 25e608845444f9c4ef61ac36f2b18dc9b1428f3a SHA-256: f9e565ad97d5811b2460c5526d9f888ba314327ec6d0c7a6e1604f19819ed913
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=search+youtube+on+google+home+hub PDF link annotation
    • https://vokugovu.weebly.com/uploads/1/3/4/5/134598923/8197214.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393790/normal_5fe4230e792cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410730/normal_5ffe82642870d.pdfIn PDF document text
    • https://cdn.sqhk.co/pumopivosoba/PpVFhj0/youtube_limbo_song_daddy_yankee.pdfIn PDF document text
    • https://rujuramokukavet.weebly.com/uploads/1/3/0/7/130739146/paniwageguru-leruvejem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379384/normal_60248f0f8d7f8.pdfIn PDF document text
    • https://cdn.sqhk.co/mojobugoge/JjdohcX/89723225043.pdfIn PDF document text
    • https://cdn.sqhk.co/dodamewope/TuMZXjc/vonevesetakiwemuxidaguzo.pdfIn PDF document text
    • https://benepota.weebly.com/uploads/1/3/5/3/135322084/rolite_buzexupubiv.pdfIn PDF document text
    • https://zewemoledomuro.weebly.com/uploads/1/3/4/7/134746436/senamegat.pdfIn PDF document text
    • https://wopufibirebosaw.weebly.com/uploads/1/3/4/4/134466277/1734374.pdfIn PDF document text
    • https://cdn.sqhk.co/ravuviwidi/hgjbOhd/kaxifegurefuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://178fd8f3-986e-459b-a431-83c1f58eadb8.filesusr.com/ugd/7a8e82_c1e0e601761b463082bba769d589aaf9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/1494124154.pdfIn PDF document text
    • http://najukelosuned.myartsonline.com/traditional_medicinal_plants.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/maths_addition_and_subtraction_worksheets_year_1.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/buzabidazawudozu.pdfIn PDF document text
    • http://vamavaremimot.atwebpages.com/96922921013.pdfIn PDF document text
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_a3580aa933f94df8b3bc86117054c4da.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/goviwigax/prepositions_in_on_at_worksheet.pdfIn PDF document text
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_762a87fcf34d4977b2dfdf28e9e69228.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/20999803795.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE0 5380 bytes
SHA-256: cc11cdeaffb39aecd216a6dd8453f3188e1c3765911ad9d19c4bcb382a147421
font_01_sfnt_off00010f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F10 11404 bytes
SHA-256: 0ef52ac059b57273393f1f3f1d52b0f5200cb27507bdbc891c8222f884699fb4

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