Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d2d4269c2ab0b5b…

MALICIOUS

PDF

73.5 KB Created: 2021-02-22 21:19:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 182a716d98282fc11b80db0616c6a3f4 SHA-1: 4af4586cd471f7692fc9213ffa418810534a6cea SHA-256: 2d2d4269c2ab0b5be76241d2ee8a4318be0debf0ad1bbbf5acddfd13e187ff10
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The presence of external URIs and the link farm heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://maypoin.ru/aws?utm_term=harry+potter+and+the+goblet+of+fire+trailer+hd PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366036/normal_601beef54d587.pdfIn PDF document text
    • https://soputepitup.weebly.com/uploads/1/3/5/9/135973261/nutusibuwuwitir.pdfIn PDF document text
    • https://cdn.sqhk.co/vumusokutil/jehajiw/nhl_news_and_rumors_today.pdfIn PDF document text
    • https://lugigotaxur.weebly.com/uploads/1/3/0/9/130969655/9123677.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459935/normal_602d55766ecb9.pdfIn PDF document text
    • https://rajilogibakew.weebly.com/uploads/1/3/5/3/135326989/954588.pdfIn PDF document text
    • http://gatorama.site/blockchain_stock_exchangez4bl2.pdfIn PDF document text
    • http://graatorama.space/kenejepimorinilebomutejiwkgxv6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492918/normal_5fe3eae122d6e.pdfIn PDF document text
    • http://talkme-news.info/dabivajebovofafowuvefuz4ynu6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461234/normal_601e8e8e4fc87.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/61142876980.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/lung_cancer_overview.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_off0000e24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24B 5328 bytes
SHA-256: c603352e2d16a2cd55344d0caf26636357d487636bb6b3e9a8709aa79bbc06ab
font_01_sfnt_off0000f46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46C 10592 bytes
SHA-256: 57e33dc8ae150ef9d1aa9296cf4348c564771adf32544e79502de7f777aa2a70

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