Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02d5cac84223e67…

MALICIOUS

PDF

63.0 KB Created: 2020-11-24 21:08:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5adb5d3b37585134fb744f434d2623b1 SHA-1: bed61eb2311cb613a6bb90d0fe75ccf7d763160b SHA-256: e02d5cac84223e6796a9e4f04cc11deaf2d3ff2b2002fff8885af54c35938df6
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a significant number of external links, identified as a PDF link farm. The primary URL, https://trafftec.ru/strik?utm_term=reddy+buffaloes+fire+pumps+uae, and a URL from the link farm, https://xoxazibazosilex.weebly.com/uploads/1/3/4/5/134590820/zanegode.pdf, are flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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/strik?utm_term=reddy+buffaloes+fire+pumps+uae PDF link annotation
    • https://xoxazibazosilex.weebly.com/uploads/1/3/4/5/134590820/zanegode.pdfIn PDF document text
    • https://dikanutedageke.weebly.com/uploads/1/3/4/4/134457663/25a499ed32641c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373243/normal_5f8d207a88a2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389095/normal_5f9d4fa60404c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374839/normal_5faf5d8e79330.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/1ef01e45-151a-4400-90d6-4a8d89b89a0f/twirl_a_squirrel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b6b3a8d-7c37-4ca5-873d-fd16467938e6/58808626271.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3981fc72-fb0b-4154-bab5-8ef521d61397/bufegagew.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/bovepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6570e71f-5ee4-4457-8420-8d09a0c7b37c/wopakabagunipatabufizen.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/tanadimekozifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b54f4e6a-a916-454b-a86e-0d578a5fe7fb/fewitomiguzolebitesanin.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/hemoglobin_estimation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07bc972c-3c08-401a-8eab-0dabf6a1e023/latex_figure_tabular_caption.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_off0000b86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB86F 5436 bytes
SHA-256: b6c8351252d97b449ebf0b492489366d93ee05780bc4ea0ecf760eb6a6e4d322
font_01_sfnt_off0000cae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE1 10736 bytes
SHA-256: 8e89ef306f7eb6bbbffa7f8b67b967f225b875554d0e5957ad6c9e9f07d2fba7

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