Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c82de3e047a252…

MALICIOUS

PDF

73.3 KB Created: 2021-04-04 19:29:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 94ca05f0c41408d274afae4d04d09fee SHA-1: 588ff2642f0e803a1c014de4b131ce1a804ef492 SHA-256: 65c82de3e047a252970c953969d966ca97bccae7a49c9e14ea8c8adea8e66a2f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=gro+bag+1+tog+guide PDF link annotation
    • https://gogimorezi.weebly.com/uploads/1/3/4/3/134316220/pexasobururudati.pdfIn PDF document text
    • https://lesidodulutenem.weebly.com/uploads/1/3/4/3/134352412/8fac6515a.pdfIn PDF document text
    • https://patawera.weebly.com/uploads/1/3/4/1/134131312/863854.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425238/normal_5fec38eb04b8d.pdfIn PDF document text
    • https://merugerizun.weebly.com/uploads/1/3/4/3/134337850/kosobanuxaviluwodipi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501998/normal_60473a15bd3e9.pdfIn PDF document text
    • https://gozawufi.weebly.com/uploads/1/3/1/3/131398332/rixawadib-vewix-sivawulumit-wavisigero.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378164/normal_6060597475104.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_6045bf9477eea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2178e3ec-2e0a-46e0-af35-d8a6fdfeb21a.filesusr.com/ugd/c411cf_e6a7e79201b24ba78aedc2776f7a8692.pdf?index=trueIn PDF document text
    • https://689a2394-1721-4ce0-b6f7-af9f1dc0d621.filesusr.com/ugd/0f5b72_350f97066b2c4ebf9fcc3db01c879c5f.pdf?index=trueIn PDF document text
    • https://dc6b22d1-fd3c-476a-b8f1-b0505981f591.filesusr.com/ugd/ab5adf_0665f69fd0294ce59116e97ba7ee6349.pdf?index=trueIn PDF document text
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_b3d9880bb37940248e4c644fd03f451a.pdf?index=trueIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_7217c1478bc648a786c3430f7ab00d9e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/evanescent_wave_waveguide.pdfIn PDF document text
    • https://cf268418-7549-4780-9cff-e39e61b5276c.filesusr.com/ugd/0b1cf2_5bfba2fe38d44c0b87f20029e6d33d0e.pdf?index=trueIn PDF document text
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_aef041f94a254b9bad60a5973109bcac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vajefam/29265296090.pdfIn PDF document text
    • https://36535336-4f9e-4c0a-b1ad-3385cb5d4299.filesusr.com/ugd/15ebe2_87916302bfad40c7bd89e8b426af9f27.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_off0000e01b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01B 5008 bytes
SHA-256: 52e2172f0c1363438140558c3e911b4543b91132c764d4b1d4dc5440d6c35bfd
font_01_sfnt_off0000f133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF133 11496 bytes
SHA-256: b1678483209902e42b6e17e56b8b019329b695f1a21fa38312e0e326c7c5352f

Open this report in the interactive analyzer, or submit your own file for analysis.