Malicious PDF — malware analysis report

Static analysis result for SHA-256 4467fc789669f1ce…

MALICIOUS

PDF

79.5 KB Created: 2021-06-04 17:06:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 38acb72646112075790d7d509e35f96b SHA-1: a9fa0026851e02b699a92d1de1c6d9a848f5ef23 SHA-256: 4467fc789669f1ce8e810af761b8b29947032f0ae21ebbdf4f98f6aa2633df48
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains text that could be interpreted as a lure for unsuspecting users.

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://jottigo.ru/123?utm_term=preliminary+investigation+report+sample+philippines PDF link annotation
    • https://jisiresofuwidi.weebly.com/uploads/1/3/0/7/130739297/3ff56.pdfIn PDF document text
    • https://rulodewarozuw.weebly.com/uploads/1/3/4/6/134678260/91159a.pdfIn PDF document text
    • https://zizipidefogin.weebly.com/uploads/1/3/4/8/134852386/8d6b9.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/zamivelinajavel-wololoba-nujaxuke.pdfIn PDF document text
    • https://befadileniralan.weebly.com/uploads/1/3/6/0/136082268/8497038.pdfIn PDF document text
    • https://rulodewarozuw.weebly.com/uploads/1/3/4/6/134678260/5593998.pdfIn PDF document text
    • https://nurirekesuvakip.weebly.com/uploads/1/3/4/4/134404885/a0458.pdfIn PDF document text
    • https://pepevifive.weebly.com/uploads/1/3/4/4/134480859/bumolelajofex.pdfIn PDF document text
    • https://wajotirege.weebly.com/uploads/1/3/5/3/135306859/97fb877.pdfIn PDF document text
    • https://zumugerajezu.weebly.com/uploads/1/3/1/1/131163828/wizaga_jomepuj_wurodazokakitu.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/e8a82221-397a-4b92-8786-c6fe1f80b72e/blade_and_soul_kr_patch_notes.pdfIn PDF document text
    • http://funinupun.pbworks.com/w/file/fetch/144418524/nudexumu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/550fab12-e88c-4919-ab1a-923701576e8d/.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7ba2977-d8f1-48ca-9add-a68a3aa78537/megulezo.pdfIn PDF document text
    • http://zowonixepor.pbworks.com/w/file/fetch/144614793/1486638577.pdfIn PDF document text
    • http://xuruzinijub.pbworks.com/f/la_tejedora_de_la_muerte_libro_completo_descargar_gratis.pdfIn PDF document text
    • http://lopofemusun.pbworks.com/f/23939049072.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80e266b1-c7d1-428d-a87a-0774d914be69/30330346878.pdfIn PDF document text
    • http://gegoxelaw.pbworks.com/f/how_to_get_a_free_carfax_report_without_paying_2019.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_off0000f5e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E6 5396 bytes
SHA-256: 9178740fb83762c19e06f71c91abf7e62a505375e0689fa2d572fd01448ad598
font_01_sfnt_off00010820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10820 12292 bytes
SHA-256: 44d8268b8297042dd2fb3c2b9c0d69919e40ce818b93dcbfdd1e3cbfa3ea3402