Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f7509d37b4b35cc…

MALICIOUS

PDF

37.5 KB Created: 2020-10-02 11:12:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7c1307b7e6935ff0c678a8d5a20060fd SHA-1: be5a8d2bbcacc6ce72e8d9bd797b7441cd91fe7a SHA-256: 1f7509d37b4b35cc8c2bbe1313afbc54b537532f3c8e77875624941ce0857445
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ggtraff.ru/strik?keyword=bloons+tower+defence+4+hacked+unblocked In PDF document text
    • http://files.hedgerow-herbals.com/uploads/1/3/2/6/132682549/pizomidab.pdfIn PDF document text
    • http://files.taichikungfuacademy.com/uploads/1/3/1/4/131437669/2590010.pdfIn PDF document text
    • http://kixija.economicintelligence.org/uploads/1/3/0/9/130969383/zolatozaw.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/1c837fb2-cf1b-482d-965d-11baa6e06447/2111694034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/804f40d3-ab31-453a-89a3-78631e533fc1/vujagaresureliwutirajebaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98cfb53e-16c8-49f5-ab96-9d4aea353114/30513684384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da998802-ad8b-441e-a36d-7ae58fd3a7ba/44525189382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e56ea6ee-f290-4b85-9ab6-e193b2d6e55d/befoninusut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3951/1960/files/bebapidujilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1470/1735/files/gunzerker_class_mods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5910/9279/files/the_macbeth_murder_mystery_by_james_thurber.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_off000053ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53FF 5544 bytes
SHA-256: 7265f003c68f058cf47790e75c9f372ca72109a35e878c53c9213faa4ba85dba
font_01_sfnt_off000066f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F0 10068 bytes
SHA-256: 4e7162927cd57dbc021ff5d5e45ca8d7b35e9d9cac4bd141fee5d34d306a2513

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