Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d4443897c1233ea…

MALICIOUS

PDF

37.1 KB Created: 2020-10-02 21:55:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0674ef85da0a36a0759fa3eb41148070 SHA-1: 7faaa5d55f4cbf74fe4be98e622afdfefad5f48e SHA-256: 5d4443897c1233ea5a9e6151ad193d6159006e06483984a7ac80b74a73f678ea
154 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://gettraff.ru/strik?keyword=calisto+5200+user+guide In PDF document text
    • https://site-1039658.mozfiles.com/files/1039658/joviwevugimefafu.pdfIn PDF document text
    • http://files.lincolnconcretenpaving.com/uploads/1/3/0/7/130775504/womapurifutavopu.pdfIn PDF document text
    • http://kiwez.got-a-man.com/uploads/1/3/2/7/132740763/gususijagijaxig.pdfIn PDF document text
    • http://files.austinarttherapycollective.com/uploads/1/3/1/4/131406456/6018769.pdfIn PDF document text
    • http://fuwug.counterpoint-journal.com/uploads/1/3/1/1/131164269/209604.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e3f5fda-e67d-4ccb-8225-2970d9410026/vusinazofesamataliposori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40be8a74-5762-4908-bebf-aa3e12d42b18/gopelabusozatu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffea139f-df4e-4ea6-acef-7b39b0cab00f/33311167426.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a9529eb-e426-4e2d-81e2-42507ad262ba/27355901303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bac5e92-8690-4943-84a2-91473b8e9e1d/1295597209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9029/7503/files/jilider.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1723/9704/files/stone_roses_20th_anniversary_vinyl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7330/5762/files/5379693468.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/types_of_sentences_worksheets_3rd_grade.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_off000051ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51EE 5296 bytes
SHA-256: b154dc80d0402707c7f220bd0c0da28c663ec4e18fcf09ef15be93a52a970402
font_01_sfnt_off000063fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FB 10604 bytes
SHA-256: d45b9c65ccce5b6c2c11f56079c181cbdd140c13b0d55fcc5f14a2b65b0d984a

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