Malicious PDF — malware analysis report

Static analysis result for SHA-256 aae2691a49b102fa…

MALICIOUS

PDF

59.1 KB Created: 2020-11-23 03:52:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a8f58403207db56c061106e832f1d136 SHA-1: 0dc6663f02834ccfa401b988306390aceea0f2bd SHA-256: aae2691a49b102fa599c33acf6904640796632c66e89663415f5d582f5abf749
244 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with several pointing to known malicious redirectors and disposable hosting domains, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The ML classifier and ClamAV detection further support its malicious nature. While no scripts were explicitly extracted, the structure suggests it's designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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.
  • 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/123?utm_term=stick+figure+badminton+3+hacked In PDF document text
    • https://latenenagizogip.weebly.com/uploads/1/3/2/6/132696064/sirovimaz.pdfIn PDF document text
    • https://kapebuzuzevasa.weebly.com/uploads/1/3/4/5/134587117/dbed3710ca431f8.pdfIn PDF document text
    • https://wabebapag.weebly.com/uploads/1/3/4/3/134335427/mopetobemiwi.pdfIn PDF document text
    • https://fixabugodorev.weebly.com/uploads/1/3/1/8/131856934/2060410.pdfIn PDF document text
    • https://ruwadegefanum.weebly.com/uploads/1/3/4/1/134108857/nizufajeludovemos.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/2d1b062464.pdfIn PDF document text
    • https://pipalilivo.weebly.com/uploads/1/3/4/3/134310902/4309967.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/sugosubexez/unidades_de_aprendizaje_autonomo.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/92678986663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd78a44d-a943-45dc-bed3-8b3c3586e0de/free_rma_exam_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/apics_cscp_study_material_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42a43205-e08c-4a12-908d-494cbed8c2d7/coraline_pelicula_completa_en_espaol_parte_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0172be9c-8659-44bd-9fe0-c00a0b8e797e/45191825888.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_off0000abe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABE8 5696 bytes
SHA-256: 1c819ea8d530772de987c791d05a8882205c578a85ec783ab95d6471fd2dda02
font_01_sfnt_off0000bf2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF2A 9504 bytes
SHA-256: a29113214412674a04ce8eeab13689949b8c933ee56ee1cb9790eea3d428352c

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