Malicious PDF — malware analysis report

Static analysis result for SHA-256 599b39ae7e64c02e…

MALICIOUS

PDF

79.2 KB Created: 2020-12-10 03:04:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 24e0b553c397f3d7a2480cc6dfabca6e SHA-1: d352666aa05d904cb57d04da9369d77fec8103ae SHA-256: 599b39ae7e64c02e56984a9fa46db889191e7041b42dae1ac908fbe1c91388b5
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-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://trafffe.ru/strik?utm_term=songs+about+the+american+dream PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448124/normal_5fd1365adfe91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447263/normal_5fa060bb6800d.pdfIn PDF document text
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/xisupexizowazawas.pdfIn PDF document text
    • https://liletalezawo.weebly.com/uploads/1/3/4/5/134591830/mutumakukumapof.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://uploads.strikinglycdn.com/files/e16a568f-79b9-4f60-aacc-ce0d5a71d7bb/fisizabepifowalozaniteg.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4e20c8ef7301f8b2a786d/t/5fcd38d16f0099009e6f1b3c/1607284946811/78436860460.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dbcbbf71053ccb0ffb78/t/5fd01263349c9408591b080a/1607471716445/prehistoric_park_builder_mod_unlimited_money.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5adbcf9866f3fd2f48671/t/5fc628089d793648405f43f3/1606821897380/class_9_science_ncert_solutions_chapter_12.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/nstu_admission_circular_2019-_20.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6a9ac085bf90c0e254f5b/t/5fcc8fc02bc7884852aeff56/1607241664744/crossfire_x_campaign_gamepass.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/fire_safety_coloring_sheets_for_preschoolers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf2df3570fb44d1c85d5a/1606283999458/21232939657.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_off0000ebc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC4 5448 bytes
SHA-256: 7b1d1c815533bdfee62668634ea8cc8319a7a5aa96d6d25d770d37673537e75c
font_01_sfnt_off0000fe0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0D 10536 bytes
SHA-256: 4476ad679ef42a915aea003475d1c1d7fc7de8097f74ea1b3a5b8c809d538be1
font_02_sfnt_off0001223c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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