Malicious PDF — malware analysis report

Static analysis result for SHA-256 64fef68e7ae0c463…

MALICIOUS

PDF

81.3 KB Created: 2021-03-22 18:31:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 10c9758b79ea64d06a2fbaa20f122fb5 SHA-1: e9548422a78915635b0612818424d0542049eeb8 SHA-256: 64fef68e7ae0c463fc3eab665f2bb3f81fa47c46103a9063bfe32b3c0d65bf8e
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://resalured.ru/wix?keyword=warriors+omen+of+the+stars+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4391009/normal_5fcac1c1d6bb6.pdfIn PDF document text
    • https://gurovepulebeguj.weebly.com/uploads/1/3/1/1/131163897/10a92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377403/normal_6012bfd9a11cc.pdfIn PDF document text
    • http://csxmoney.info/hp_z420_driver_pack_windows_10fim8z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416656/normal_5fe7a2167e22e.pdfIn PDF document text
    • https://lejoleguje.weebly.com/uploads/1/3/1/0/131070186/9763943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426270/normal_6009cf7959503.pdfIn PDF document text
    • http://carbags.site/78806360937ekaba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403960/normal_60093de37e3d4.pdfIn PDF document text
    • https://mafobosapufi.weebly.com/uploads/1/3/4/5/134505980/6763808.pdfIn PDF document text
    • http://tesar-krd.ru/my_institute_diary_for_pc9opc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369926/normal_603f01f0dabf0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1a98590-db5d-405b-96f5-125e6c517968/beethoven_moonlight_sonata_free_sheet_music.pdfIn PDF document text
    • https://c3bb11cb-ba02-405d-8462-2b4421b436e1.filesusr.com/ugd/4c7814_36aab113319e4e0e9cd8b98d0488ff12.pdf?index=trueIn PDF document text
    • https://cc652f91-b1ab-470c-b36f-46d838ef85b2.filesusr.com/ugd/fbccce_e2e5912951ed433aa32e44e5dd4498d0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e55f641-93c0-4ffb-8891-15b78e471d57/how_many_calories_are_in_an_arbys_slider.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eb7611f-bc16-47b0-906a-2183d5707ece/ap_psychology_treatment_of_psychological_disorders_practice_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18c567a4-4e01-41ad-8a43-e35ae6770db0/84425858457.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_off0000ff91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF91 5264 bytes
SHA-256: 023d5a4c12e820cc0c5055ab5412b038ed5f790a0284cd187fc40c3c44b3eb21
font_01_sfnt_off00011159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11159 10812 bytes
SHA-256: 2ce0b34b6a2b2d4ee8c5da7cc02cf02f9e462ba0de262fc1f1fb5b04aedb1961

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