Malicious PDF — malware analysis report

Static analysis result for SHA-256 76665b8712334d8e…

MALICIOUS

PDF

70.8 KB Created: 2020-11-14 01:23:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a4a844496c1341cf49f58cdbe415e248 SHA-1: 2a9d39c944c5e496d14f69371b16210d5a0fe457 SHA-256: 76665b8712334d8ec4a664b9555a4e5834bd632e27bde40e09996d5794d86845
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 5

  • 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 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://traffset.ru/strik?utm_term=cine+picaro+mexicano+online PDF link annotation
    • https://xisiwazebisa.weebly.com/uploads/1/3/4/7/134758569/4111619.pdfIn PDF document text
    • https://ligibodi.weebly.com/uploads/1/3/4/4/134469997/42a71.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/8554420.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/junukavobojubimazuw.pdfIn PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/18f8d4e2b.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/ditupor.pdfIn PDF document text
    • https://debasomi.weebly.com/uploads/1/3/0/7/130739769/5105209.pdfIn PDF document text
    • https://wowifowukanu.weebly.com/uploads/1/3/4/6/134634936/1297445.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/minecraft_sweet_and_awesome_restored_jar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/193913dc-e81a-455c-bf9b-b386e55948c0/geronimo_stilton_free_ebooks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa893565-9fed-41e3-92ea-c353400ffb8b/44736222394.pdfIn PDF document text
    • https://s3.amazonaws.com/fulomufimikim/gawamebujinejomukegop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9f69f5e-4f66-49b7-a0c0-e7a6b10899b2/joe_mccall_wholesaling_lease_options.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e086d64-1a5a-4376-8ff5-c1dec1cda3a9/cissp_exam_cram_3rd_edition.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC6 4876 bytes
SHA-256: 0c57c0678435db2aa8112d4ed4dc9da82b7aaa0ae174fef6a92b9944902115d0
font_01_sfnt_off0000dc3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3D 2068 bytes
SHA-256: 4e251cc56038540205952d4633de7f586b0146582f87cc1e8db3b5bb55ee9878
font_02_sfnt_off0000e5f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F0 11844 bytes
SHA-256: 50b503957a15e98f86176ce11c3bb29a704fc516ecc820c84c71844217d5d630

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