Malicious PDF — malware analysis report

Static analysis result for SHA-256 51579980c73a6a44…

MALICIOUS

PDF

69.0 KB Created: 2021-03-02 17:56:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d72f7e0f4bebddb9e278e5ce44727c53 SHA-1: 00e1c662be88e19794f4f5144d64f484343f6043 SHA-256: 51579980c73a6a44a2aa918d5b8ff75aa1df98cdc5878e36c61c523dd085b5cb
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of 'Tissot watches prices in sri lanka' in the document body and a corresponding URL indicates a lure to a potentially malicious site. ClamAV and ML classifiers also flagged this PDF as malicious, supporting the phishing and potential malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xezojetit.ru/123?utm_term=tissot+watches+prices+in+sri+lanka PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386333/normal_5ff21b2fe9911.pdfIn PDF document text
    • http://mebets.xyz/86650336037wnecs.pdfIn PDF document text
    • https://cdn.sqhk.co/zupitefa/djjahfQ/merge_burger_food_evolution_cooking_mergers_and_acquisitions.pdfIn PDF document text
    • https://madafodem.weebly.com/uploads/1/3/5/3/135397102/7359494.pdfIn PDF document text
    • https://zabojipenow.weebly.com/uploads/1/3/1/6/131636987/kunim.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/33373187469.pdfIn PDF document text
    • http://usesoda.pro/27748141328eead.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390097/normal_6006b43d18d98.pdfIn PDF document text
    • https://xidokuwu.weebly.com/uploads/1/3/1/4/131453793/jigiboxizimele.pdfIn PDF document text
    • https://samazixudoreput.weebly.com/uploads/1/3/2/6/132681586/6498290.pdfIn PDF document text
    • http://dizititakozazi.mywebcommunity.org/top_selling_management_books.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365584/normal_6002fbdd67ed8.pdfIn PDF document text
    • https://xudisuwovoj.weebly.com/uploads/1/3/5/4/135400752/wipajegosa.pdfIn PDF document text
    • http://milano-moda.space/8162316610qjo76.pdfIn PDF document text
    • https://nifakisafuzum.weebly.com/uploads/1/3/0/7/130775286/9d63ddcd1c89.pdfIn PDF document text
    • https://vovazukaliwo.weebly.com/uploads/1/3/5/9/135962855/fufezamavizadipemiwi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/93859722585.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_off0000d247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD247 5124 bytes
SHA-256: f9ccd52d6e9ffa03d405266c87422f5e640c48e85b525a97972f0c5569e81167
font_01_sfnt_off0000e3c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C3 10444 bytes
SHA-256: df2b76e32bedebf39f1bae1aab93f7705d72c2c4224c7c69bfcc59a175c41bad

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