Malicious PDF — malware analysis report

Static analysis result for SHA-256 9563bd89771327f4…

MALICIOUS

PDF

57.7 KB Created: 2020-12-20 20:55:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3952d634f6f7db7ae169b857fe3df1a3 SHA-1: ee62ab11bdf2ad6aa2f814aaf2515ac9dde1a8fa SHA-256: 9563bd89771327f4f6a7b58b98346d7ad18451f221cc3a050c007b43409b9cdd
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains an external URI and an SEO redirector link pointing to 'https://traffnew.ru/123?utm_term=1997+seadoo+speedster+parts+manual', suggesting a lure for users to download further content. No scripts were extracted, but the PDF structure and heuristics indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://traffnew.ru/123?utm_term=1997+seadoo+speedster+parts+manual PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2787a4f-bcb1-4a64-a5da-effaf24f363a/mikigonebipemozuxojar.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d12c3dfdd95b60d4a66f/t/5fc16138f8cdb769c617489c/1606508857976/gobexisofevaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/113428e6-5ee0-4094-899a-85542e84adc0/58229235452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f09a87fd-15f8-4cce-882c-d4a445265817/reinforcement_activity_2_part_a_sales_journal_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/dependent_versus_independent_variable_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc19ab11452f90b7fea4d21/t/5fc3c2b69ee0f32b87c641e4/1606664886594/types_of_opal_and_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0f7b242-fc0c-4692-aafd-705c12790fc0/32537286795.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/vagokizopixaxelineg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b931d5e5-c32b-4f86-98c3-22d07ab55cbc/gijupavovewidujoribupe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/facdd762-d50d-4e62-9d81-2a72cdc9c77a/princess_tiana_dress_disney.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8413079c-ce12-4043-8267-6d2d22fd6b78/69471395839.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA969 5296 bytes
SHA-256: d889d12ecd4fab1bbc80b655a778b0c9eed32d4cfb2557d932bf75b61ef13b7b
font_01_sfnt_off0000bb59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB59 9072 bytes
SHA-256: 6c9daebac469c84ddb016b4460adea69363ebe6c181a41ce661deed9835a593f

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