Malicious PDF — malware analysis report

Static analysis result for SHA-256 30df49d145a01990…

MALICIOUS

PDF

103.1 KB Created: 2021-06-09 17:22:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6efa4cad98385a727307e446050cf30d SHA-1: 17cb7ab9492cfc2511ecce398753fbf086ad9740 SHA-256: 30df49d145a01990a724e77cfcbae6f506a7eb191986f721eedcd5fe4eb01121
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://huntic.ru/pbw?utm_term=gta+duplication+glitch PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367665/normal_601733da1bcd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388608/normal_5fd66cc63a30a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368976/normal_60287c789f0d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485310/normal_604719218e3e3.pdfIn PDF document text
    • https://xulowipel.weebly.com/uploads/1/3/4/5/134594063/bozuxatujolowaz.pdfIn PDF document text
    • https://totuseki.weebly.com/uploads/1/3/5/3/135322554/5941989.pdfIn PDF document text
    • https://lemabifi.weebly.com/uploads/1/3/4/3/134319461/3030872.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476282/normal_600e22d8a9cf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481518/normal_60628daa042a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481286/normal_5ff5d43e665e7.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4458615/normal_60b4f9e8863b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483337/normal_605ae60b3252a.pdfIn PDF document text
    • https://duzonaxur.weebly.com/uploads/1/3/4/0/134012347/3672763.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499319/normal_6018f91416d2d.pdfIn PDF document text
    • https://dudasajaje.weebly.com/uploads/1/3/4/3/134362454/276817.pdfIn PDF document text
    • https://jadusulad.weebly.com/uploads/1/3/4/7/134764450/63fb9a5a6e8d88.pdfIn PDF document text
    • https://pupifino.weebly.com/uploads/1/3/0/7/130776741/1422324.pdfIn PDF document text
    • https://tetavezodumop.weebly.com/uploads/1/3/4/6/134645623/9519125.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mosijiv.pbworks.com/w/file/fetch/144424395/59086096726.pdfIn PDF document text
    • http://nitezug.pbworks.com/f/is_ap_seminar_worth_it.pdfIn PDF document text
    • http://jebusolole.pbworks.com/f/columnar_basalt_locations.pdfIn PDF document text
    • http://bovozajezo.pbworks.com/w/file/fetch/144473013/ejercicios_de_la_tabla_de_multiplicar_del_3_para_imprimir.pdfIn PDF document text
    • http://wejojixi.pbworks.com/w/file/fetch/144424404/discussion_questions_for_who_moved_my_cheese.pdfIn PDF document text
    • http://tukufidanega.pbworks.com/w/file/fetch/144568542/viwezizabinubemewotokale.pdfIn PDF document text
    • http://buvavipoluvu.pbworks.com/w/file/fetch/144562656/bala_tripura_sundari_moola_mantra_in_kannada.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_off00015170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15170 5092 bytes
SHA-256: f6fa13e0adb39a4d784e0d92d7215f662ccb1e6a2402827345334c2fffa0b03a
font_01_sfnt_off000162c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162C5 13224 bytes
SHA-256: 8fb0237fb6ec1d715398f97a43d3df24637d6ba5413a2f4525f9a4097f7ef118