Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba6b9b02a696d3dc…

MALICIOUS

PDF

68.2 KB Created: 2021-02-23 09:40:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 30511ec8079c75074d796137ccae4412 SHA-1: cb8d7740b9c6d9eac62cc4a487a128245b343565 SHA-256: ba6b9b02a696d3dc8c24e90acd4ef88274359a40349ad9cc819d821784dc159f
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to a quiz, which is a common tactic for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://druttle.ru/strik?utm_term=a+raisin+in+the+sun+quotes+quiz PDF link annotation
    • https://cdn.sqhk.co/jegisizozul/EM9jdtF/the_wonder_weeks_book_free_download.pdfIn PDF document text
    • http://akvatehnika74.ru/truist_financial_corporation_mailing_address0twhn.pdfIn PDF document text
    • https://cdn.sqhk.co/wanaxowuwot/XEjaibL/lego_batman_dc_super_heroes_cheats_wii.pdfIn PDF document text
    • https://cdn.sqhk.co/woselukafo/jbgdggA/30394468522.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizilo/jjifii3/28307992432.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453553/normal_60155d58197c9.pdfIn PDF document text
    • http://pedrons.space/gerry_mulligan_discographyut98l.pdfIn PDF document text
    • https://cdn.sqhk.co/navotezive/jzKwOHS/best_free_mp3_download_website.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/vidadaviwal/jabevupegamuviboralejofov.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/61090605928.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 4

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_off0000cf41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF41 4908 bytes
SHA-256: f0b3d8b68190787695a5e6ca5df0b9ad01fbe3488daaf888874d1b175dc34b70
font_01_sfnt_off0000dff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF1 10812 bytes
SHA-256: ea40ab1754d35b8b59caa227ae573d746cdc4f63f16833420ef0ffbf069aa8e6

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