Malicious PDF — malware analysis report

Static analysis result for SHA-256 513c04dbd4be4214…

MALICIOUS

PDF

78.5 KB Created: 2021-03-24 03:16:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e183656c3c3777ab8ed6e07735ba2328 SHA-1: 700d1114991e8ddc2a845c2568d2b6c4bef00f27 SHA-256: 513c04dbd4be4214b5ce9f9be9adb3afd4b1f9eb0ac75f672afdcfce8746e987
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-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://bologen.ru/wix?keyword=avalon+high+2+pdf PDF link annotation
    • https://pelimabogex.weebly.com/uploads/1/3/4/6/134685965/vodoxux-togamaf-wakil-sanuditijoluf.pdfIn PDF document text
    • https://posalezonekat.weebly.com/uploads/1/3/4/6/134628665/5223391.pdfIn PDF document text
    • http://francobusiness.com/bulgakov_mester_s_margaritaax77t.pdfIn PDF document text
    • http://ppl-nutrshopfit.website/86139484696otmxx.pdfIn PDF document text
    • https://pudexaxetodeli.weebly.com/uploads/1/3/2/6/132683251/subuxuwosope.pdfIn PDF document text
    • https://datulexajolibup.weebly.com/uploads/1/3/0/7/130738708/lofomabodub.pdfIn PDF document text
    • https://nupimixek.weebly.com/uploads/1/3/2/7/132712066/d91fd5d55ee418.pdfIn PDF document text
    • https://nusuxoxoli.weebly.com/uploads/1/3/2/7/132710665/937913.pdfIn PDF document text
    • https://sawamamuwez.weebly.com/uploads/1/3/5/9/135992332/savog-tukafawofomuz-viwaruxogakofoz.pdfIn PDF document text
    • http://peskomment.ru/twin_saga_goldy9vgv.pdfIn PDF document text
    • https://mixogefok.weebly.com/uploads/1/3/4/5/134587058/7526791.pdfIn PDF document text
    • https://dasasaperot.weebly.com/uploads/1/3/4/6/134665710/kejev.pdfIn PDF document text
    • http://mexicotop3.xyz/jamexazifulesizedazib9b8e9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0aa989e7-076c-475f-bc22-fff5ae310860.filesusr.com/ugd/b44be6_20a0a59960e3476f92953ee35a4f3c6f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/620b13df-774b-4026-b12a-411b118982ca/36956406417.pdfIn PDF document text
    • https://ce55c564-0e79-48ac-bd91-a034cff8554b.filesusr.com/ugd/bd1fc0_0cebd78e64bb476b88800d94974b6a82.pdf?index=trueIn PDF document text
    • https://05491ccc-77c7-428b-9c25-74f2c6c50d4a.filesusr.com/ugd/d51d36_fded44a48e8a4f6d9d5bd62475598baa.pdf?index=trueIn PDF document text
    • https://245ae9ba-e923-43ed-bc11-30ed5d1acd78.filesusr.com/ugd/051519_c9b15267b720420fbc28d0eebb8c1575.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa485274-f725-4084-bf2d-6f8d205ace41/37031663551.pdfIn PDF document text
    • https://ea64ff4c-51e6-4efc-8cc1-399682447901.filesusr.com/ugd/961f18_c66c3babe14047eba8f985ed3b4fbf56.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_off0000f426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF426 5208 bytes
SHA-256: 20f7ec60f13753776eadb13a631f0d50f1b55f24c23cc70f400602a7d7462e60
font_01_sfnt_off000105ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EE 11492 bytes
SHA-256: 6f7762957f4d0db10b89d1005eb9881c0d9bd3def05c210de33c19151298e934

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