Malicious PDF — malware analysis report

Static analysis result for SHA-256 27358963e6695ff3…

MALICIOUS

PDF

81.2 KB Created: 2021-03-20 07:32:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8faf50995509e7ed0810be53100305dd SHA-1: ff8c4c4d3432af88f4990de88f5e6c42c577c662 SHA-256: 27358963e6695ff308c04fb3b02d2d12b3fe0b4be961b00484992ff302d56d6e
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs and the document's structure point towards an attempt to trick users into visiting malicious sites by masquerading as a search result for a specific manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/wix?keyword=2015+toyota+prius+v+owners+manual PDF link annotation
    • http://xevusezes.medianewsonline.com/business_model_generation_handbook.pdfIn PDF document text
    • https://jedegifopa.weebly.com/uploads/1/3/0/7/130738854/gawakezejig_junuge_wevesofu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410433/normal_5fe3f2a5194ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388421/normal_5ff9b59b21081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467576/normal_601834c8dbcfe.pdfIn PDF document text
    • https://biweworu.weebly.com/uploads/1/3/4/5/134525234/1222282.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369653/normal_5fe27f732b3c8.pdfIn PDF document text
    • https://cdn.sqhk.co/wiparodub/jgOYCge/basketball_3_point_shots_free_games_online.pdfIn PDF document text
    • https://mivewuwadomabat.weebly.com/uploads/1/3/1/6/131606259/ad904b21c022c7.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwipabobatu/VZgeigX/21420942600.pdfIn PDF document text
    • https://cdn.sqhk.co/xenekifa/ofib11S/heal_spirit_sprint.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382629/normal_5fd7d787d0813.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a815f367-2516-4b88-9496-eed07d5c1eb7.filesusr.com/ugd/665c20_7dba19b5f61a46c48933383850f25532.pdf?index=trueIn PDF document text
    • https://e94fd2ea-e363-40b7-879f-601f98d10a93.filesusr.com/ugd/89b1bc_dabc11a845dc45079a57a1590ef30d43.pdf?index=trueIn PDF document text
    • https://8533cbf3-c0d6-400c-bdf8-8ca38cf0242b.filesusr.com/ugd/135178_0c22a177ec814f3ea2800e1ae8de91d7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/widuxade/poulan_2150_chainsaw_carb.pdfIn PDF document text
    • http://gomugugagaf.onlinewebshop.net/befogoxikidoworosolajaza.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/7.3_powerstroke_engine_parts_ebay.pdfIn PDF document text
    • http://zitulogakapede.myartsonline.com/familia_asteraceae_caracteristicas.pdfIn PDF document text
    • http://vokesakogo.onlinewebshop.net/rerezofidilakidakojipelaj.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/czardas_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/how_to_read_a_battery_date_code.pdfIn PDF document text
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_1e8228a4d4f545c9af92849fa40fd56e.pdf?index=trueIn PDF document text
    • https://788ae96d-7a4f-4726-91a9-07bb742fb3e7.filesusr.com/ugd/97aff7_0110004113fd48bfb6688328ca327799.pdf?index=trueIn 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_off0000fd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD92 5576 bytes
SHA-256: ac3a1fdb4ba82a34e024669c02e176307e3496beeca32f940a36405014630ea8
font_01_sfnt_off00011094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11094 11300 bytes
SHA-256: 5e7c136fdc9fbd45d948eb23570e714a3672671ee1e7f055887d057e347fd673