Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce018a14ede1181d…

MALICIOUS

PDF

69.0 KB Created: 2021-03-18 11:07:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8c2199c110dc829921f07e1de8727580 SHA-1: 966d60961f821fb1c7256ba333bbd8b009c61d82 SHA-256: ce018a14ede1181dbf7471126fac56015eb67c77cef871f91eb240a3562c8157
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://kuzutuzo.ru/award?keyword=revenue+sharing+formula+in+nigeria+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447434/normal_604d2f5e575b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369317/normal_601ce9a2b3351.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384835/normal_601598e0605ac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://200c4c3d-185b-4246-b99f-f40cd7065c99.filesusr.com/ugd/3ed902_31ff25ac7ee344399821c0f4972bc6ae.pdf?index=trueIn PDF document text
    • http://jigosip.epizy.com/nikakomolemufuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43b8aac3-b1e2-49d6-b28e-6ec60b597bad/touch_of_class_promo_code.pdfIn PDF document text
    • http://sifuzetijo.rf.gd/49287064182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/294b2ae5-e0d5-4f21-a2a8-6e9464c47e5f/your_final_walk_through_before_closing.pdfIn PDF document text
    • http://jofikajanuxepu.epizy.com/microsoft_wireless_mouse_5000_linux_driver.pdfIn PDF document text
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_dbf0d42a6bc24e8a8dde28b621b613bf.pdf?index=trueIn PDF document text
    • https://c7ecfb45-4de9-4174-91ae-4a3416e09b0d.filesusr.com/ugd/fc4f66_d7374bddda7140d58f788756ec9de376.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fb8e37b-e642-4429-af5e-53d8292cc465/hp_probook_6560b_core_i7_specs.pdfIn PDF document text
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_d6a3229a285244508cfd5009a07009b8.pdf?index=trueIn PDF document text
    • https://2c5a832e-93c4-4ab0-bef0-969ef348d747.filesusr.com/ugd/cc5daa_2d755abfe6ee45168f1ce559f07b84be.pdf?index=trueIn PDF document text
    • http://furubaja.epizy.com/37785397574.pdfIn PDF document text
    • https://86908e24-11f3-43a1-9346-bf531f45ee0b.filesusr.com/ugd/97493d_faa7d3f4312a477795f44e849fa7bf4e.pdf?index=trueIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_88f040717de1452b9b5eccf7b60bc34d.pdf?index=trueIn PDF document text
    • http://mufogedone.epizy.com/volilijofenoxito.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_off0000d006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD006 5520 bytes
SHA-256: fbad7de2a3d8a1cc90ba896d0838975c7d0571c5607f2583a32c9fbf043082d2
font_01_sfnt_off0000e2ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AD 10500 bytes
SHA-256: dc987294a610e3a4ce0b3c72bfd495481b1af74add1fdfd0d052e7af4a19598c

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