Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbeadb3f71866a4d…

MALICIOUS

PDF

77.0 KB Created: 2020-11-18 22:41:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 25253246b433185972d40e111b225d9c SHA-1: 1285eb2ce86832825cbe31e0c3b014e4a18ca65b SHA-256: fbeadb3f71866a4d22f38f86e5c0bf4b2b189412de6b1b995e6f51c3287bd8f1
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ggtraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external PDF documents. 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?utm_term=blood+of+dark+soul In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420430/normal_5f9b233068aa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477401/normal_5fafa456d771a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443342/normal_5fa6b69a22b14.pdfIn PDF document text
    • https://worobewunit.weebly.com/uploads/1/3/1/4/131406731/kirozifedu-linusabadi.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/sefufizodofok.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/ropuba/80634042776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c611e02e-5742-4961-b637-7bb119a7535c/magistrate_definition_ancient_rome.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/gene_augmentation_therapy.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/timex_clock_radio_with_nature_sounds_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/65571024196.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/mumizifomezapefuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcc9d7c2-0fbf-4c92-b101-31237450f1c9/15681229839.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/jiravudamuki.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/elite_dangerous_voice_commands.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_off0000f261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF261 5012 bytes
SHA-256: 648971d872753c1b0a2fb15091408004d2ebc5f9e79f84fe00c1602191b837f7
font_01_sfnt_off0001037e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037E 10724 bytes
SHA-256: 5c0d4cd698e6b4c4b08eb9c98e7294366803fb760b47465a588fa543a02c00f2

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