Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec6e8ef49fe6832e…

MALICIOUS

PDF

35.8 KB Created: 2020-10-11 00:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bc35138240238db901b389e0217a7947 SHA-1: 98c5f54f806ba36c7337f6d01559723c678bfd9f SHA-256: ec6e8ef49fe6832ecfdd71c63e48b392928483cd09ed3d557486c80ae65437d3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for a study guide. The presence of a large number of external PDF links further suggests a link farm or SEO manipulation for malicious purposes.

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.
  • 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.
  • 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/pify?keyword=the+culinary+professional+study+guide+chapter+15 In PDF document text
    • http://gituvadub.pueblotint.com/uploads/1/3/1/1/131164567/fitomakuzil.pdfIn PDF document text
    • http://files.grittsfarm.com/uploads/1/3/2/7/132710589/zipomatavidel.pdfIn PDF document text
    • http://tebedekiv.the-beeline.com/uploads/1/3/1/1/131164250/dozaxejevibazi.pdfIn PDF document text
    • http://rejiwuwox.gwdayschool.com/uploads/1/3/0/9/130969707/xewikadef.pdfIn PDF document text
    • http://zudonuje.stjosephfortjennings.org/uploads/1/3/1/4/131483229/vugodimiru_novepifaloraset_sowuzewitobukom.pdfIn PDF document text
    • http://files.cocreativ.net/uploads/1/3/0/7/130738972/d48368aa9c1.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/a88585b6-c2ab-48eb-b03b-8acf6177f167/jilugovexoloso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c807e135-6651-49c2-86e4-d786a7f9c6b9/zivusozofanaperawizoxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e092b573-a59e-4185-bf8a-103f70445d79/luzofosopezupubaponag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61843ce6-b94b-4c80-a3f0-586367481030/pebopelawikan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b51882f4-4ca2-4dcf-bb2c-6a5997b7d663/sukigibolozufupedafut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd5fcb93-2d4a-48b2-9f50-e8a8eadaf81f/fivedew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51a60e55-bede-4f93-9be3-ac99fbc9ee8e/kasivineludaja.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_off00004cf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CF1 5644 bytes
SHA-256: 92589dc09e4e2140f5cdcef54f2701fcd7c19bc849e257ad265dcb4a82464263
font_01_sfnt_off00006023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6023 10056 bytes
SHA-256: cf742924e57883d499fb4f8b7074b73fbd496e23cd4fa6961c2a33c6632d0db2

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