Malicious PDF — malware analysis report

Static analysis result for SHA-256 f879a69c59d068f0…

MALICIOUS

PDF

83.9 KB Created: 2020-12-21 09:40:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 056599be33e5ce16526e275a202fd976 SHA-1: 13808a92ea1d83da9048384be1b871ccdd1f03a6 SHA-256: f879a69c59d068f0cd69607129d35345263badc00c44dffe15e0a908a857bad7
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://traffine.ru/123?utm_term=burn+notice+wiki+michael+westen PDF link annotation
    • https://kojovade.weebly.com/uploads/1/3/4/6/134681743/vuxivipu_rusixatemod_fowomo.pdfIn PDF document text
    • https://womomoko.weebly.com/uploads/1/3/4/8/134848640/569928.pdfIn PDF document text
    • https://gokajafiwewafij.weebly.com/uploads/1/3/4/3/134314986/0f71e9e0559690.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387919/normal_5fa2cb9cba22b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410443/normal_5fa86f13bc067.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/a12f42ed-e033-42ce-bf2b-8903e051feff/words_beginning_with_al.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc0a1860-40e9-4dc2-8304-74ce94ef2f56/zulavu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc659750a2757459b082a1f/t/5fcec55455629615613e8beb/1607386453681/vigigepo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc9f43fd-e91b-48a5-9008-f81a2e2b6f1b/summer_in_spanish_google_translate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8a29c2d-c22d-4646-81f8-2c3242aaeaa7/guide_to_paladins_dnd_5e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c64372a-6a4b-4287-ae74-2365bdf75ab6/zewef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe225bf8-7524-46be-86c7-a6d213febabc/bawilozegewijulofomawojim.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_off00010bcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCF 5244 bytes
SHA-256: 734c1b3b061673287b0d06a6308409c91f00056e984650e583ce8723c0392bad
font_01_sfnt_off00011d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8B 10788 bytes
SHA-256: 18e4bda7c7791c62a6679cac7b656318e2ff5f3ad8d91d8333f67533dc70d8c3

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