Malicious PDF — malware analysis report

Static analysis result for SHA-256 650e48ff071cfa38…

MALICIOUS

PDF

62.9 KB Created: 2020-11-12 17:34:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b78a5d657ae1f374efccc9dac0beda55 SHA-1: 2d3b347c7d81be4852b42589b7f41cce6a873eb5 SHA-256: 650e48ff071cfa38b5b45deb6519263438cf065e8826a329cee0cbf7fa137f76
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://trafftec.ru/123?utm_term=6+gallon+electric+water+heater+bradford+white PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378393/normal_5f91bc83bf0e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447434/normal_5f9e0812af7f3.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/ludozewowonufalo.pdfIn PDF document text
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/9b84c1.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/sobipidixi.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/82b924fb-0647-45d2-bda3-1b73c65ce6d0/21526441048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c533ccc4-0817-4743-8d6d-439e2f0f2130/motiterazoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e119b3d-3bd9-4b13-a267-44ac174e215c/wepobojel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/613bf2f9-6587-4d6d-ac29-fa5ba2703b85/jetumuzokolagopuladujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66ca2572-e839-4b7a-9a75-16a4720e7965/nuguxagimewutopilodak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/950cfbfe-390e-41a9-a412-2b09dc2a7259/ridujixalag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f8070d3-3263-46b9-bafe-138dff297f5e/17286024751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42ec4c68-eba8-4d49-b6a8-2c522b166fc5/jutopaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f78d794-d1a7-4475-854e-8c904b5db4c7/67274853855.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_off0000bbee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBEE 5396 bytes
SHA-256: 957612faf105a843cf0408b5b80a52585cce38083737bef368f855aeaaf82cbc
font_01_sfnt_off0000ce4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE4F 9600 bytes
SHA-256: f8ee812cd3d62878e97e2899a31ed614dbfcda8f8f4f454b37f3b664c5dbb110

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