Malicious PDF — malware analysis report

Static analysis result for SHA-256 b443edd49365b0e9…

MALICIOUS

PDF

73.3 KB Created: 2020-12-09 19:19:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 83e7f9da4038d8b9d41c12aed0a35e82 SHA-1: 90cf0258587089905df62f0d6aa707bd141ca05d SHA-256: b443edd49365b0e98226b731bed110c7228a935c0338182f3b148c547a7209a6
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://trafficel.ru/strik?utm_term=fortnite+free+account+email+and+password PDF link annotation
    • https://pebepatesova.weebly.com/uploads/1/3/4/4/134447190/ledoge.pdfIn PDF document text
    • https://metubunotawe.weebly.com/uploads/1/3/4/5/134595280/ganul_funemujimovogiz.pdfIn PDF document text
    • https://lolipakefupixo.weebly.com/uploads/1/3/4/6/134614949/fisiduvegebogolavuba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc2cae0c30a162e0c5ec24a/t/5fd04f281c49363a9b470bc5/1607487272499/lozararagududofaruvu.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/68600232715.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc69409ec917750a3fee43c/t/5fcb3adb9cf56e0e8b0e56cb/1607154397845/zanurilumig.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc538fa6b97992eb578077c/t/5fce7b291d54d827128330ca/1607367466519/9_months_before_october_24_2006.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c14b27a199023ace2433/t/5fd079f4a9460057587f06dd/1607498231719/super_unblocked_games_hacked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41fd3147-5167-434b-a004-6c5cb9405116/ff14_eureka_pagos_unlock.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7962c778af068263f57f8/t/5fcb22f50814be4f73e47dc4/1607148277734/block_craft_3d_hack_unlimited_gems.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5db78a5bc066edfc78c8f/t/5fcb298321c0486e91905b65/1607149955521/ninja_dash_mod_apk_happymod.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6541173fb5383b9a5dda/1606378817628/kowukumiwirumejupemufif.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_off0000e2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A6 5348 bytes
SHA-256: a06575594e0f49013a12b5f286cc417577c254af72e198c51b4c86ef6e0959d8
font_01_sfnt_off0000f4d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D0 10416 bytes
SHA-256: fc21ee854b7fccf7e8afd870f7f54270a82307fb3d9b6ab8b7474f3da891695f

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