Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee5bf5579a4562d7…

MALICIOUS

PDF

71.7 KB Created: 2020-12-16 08:50:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 21c4a2aee2ee014d701e0652ac747119 SHA-1: d3b482bf5c85d77d427fdc588653b7d59864ed29 SHA-256: ee5bf5579a4562d7fad31106c9e5bb04c02f3504b355578b51700586e125af62
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://trafficel.ru/123?utm_term=resident+evil+outbreak%253A+file+%25232 PDF link annotation
    • https://tovepeluzon.weebly.com/uploads/1/3/4/3/134385389/69ccc1bd2.pdfIn PDF document text
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/5717476.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/jedobufudajewu/agricultural_marketing_in_india_book_by_acharya_and_agarwal.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a88b8787e879898c667c/t/5fd71e64c4373837b923cf1a/1607933541646/mufaxawoxidodonotoj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc108c2a879396864090c6f/t/5fc593a93c6ccf69f31e88ba/1606783913843/zikafijobuxolupa.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/jojo_s_bizarre_adventure_episodes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90bed750-861d-45cc-abbb-e3fd78752626/50427541307.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38ff2cf5-7ebc-4898-996b-35ddaa497f79/68014674495.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/nexewijidut.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d5d09955c744b554a542/t/5fcda62f9aa2de0c64b04147/1607312943633/bikiwanulexo.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/zapya_apk_download_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/breezer_vivid_shuffle_song_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDCC 3380 bytes
SHA-256: d997816e75729e73773633583a395f172b206c28d92c974aedefb185c2ef985f
font_01_sfnt_off0000d9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F8 5224 bytes
SHA-256: c3492a7e45e2a53a866401876bc5cab05fc50dd25b940e41f0d44f01038510c5
font_02_sfnt_off0000ebd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD3 11368 bytes
SHA-256: 5d818545b40a6eaf91b147df07aec325623f6edddb9e701ccd88cb94a16056a6

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