Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ccebff32dccbcdf…

MALICIOUS

PDF

77.3 KB Created: 2021-04-06 00:39:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2f8f065f4ad6ff3db73d17665654ca15 SHA-1: 5506289adf611b2946561441631e8c994545dcae SHA-256: 2ccebff32dccbcdf9750b6ee51b15b2cf8d193fc856fed2b5b6a5a22c918a1c7
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://jacksth.ru/award?keyword=libros+para+aprender+ingles+pdf+con+audio PDF link annotation
    • http://avbox.org/39185608296w7x5p.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/ifjjRia/63528042550.pdfIn PDF document text
    • https://cdn.sqhk.co/remokuvupen/fejdsid/zababerojir.pdfIn PDF document text
    • https://cdn.sqhk.co/zevivovakok/tgfrVhi/fubaso.pdfIn PDF document text
    • http://b4shop.icu/real_racing_3_hack_ios_download99lk2.pdfIn PDF document text
    • https://nodeseverew.weebly.com/uploads/1/3/5/3/135323512/0dd590f.pdfIn PDF document text
    • http://thefortykuti.com/jonukobajegafojonixamumoxvlqfl.pdfIn PDF document text
    • http://walkover.me/xasutarodatedalagiy0p1h.pdfIn PDF document text
    • https://zegilaritapedu.weebly.com/uploads/1/3/1/4/131438092/356a21355d.pdfIn PDF document text
    • http://eroganoficial.site/android_x86_dual_boot_windows_10w0zvj.pdfIn PDF document text
    • https://milorupubi.weebly.com/uploads/1/3/4/3/134317418/jevelat.pdfIn PDF document text
    • http://sks-expertiza.ru/how_many_star_wars_books_are_there_in_totalwfpjf.pdfIn PDF document text
    • https://vovasodakujex.weebly.com/uploads/1/3/0/8/130874601/gewap-zanidenibovux.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/1762f581-65a1-43bd-afbc-61fa27a17d04/vubunikejetedasisigunifov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0fb305e-eafc-4bcf-b443-7949247cea2c/jopimifumakexirufikaf.pdfIn PDF document text
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_cb2387fd63b9432682e6f08fb2ec74a5.pdf?index=trueIn PDF document text
    • https://438c9214-13ba-44a2-8469-a4c97ff43377.filesusr.com/ugd/5d46a0_169ab435be334177a6cdcdb9d189660a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffa9651a-3b2c-42c8-9b8d-c807e7739338/pipoxidupijofunejametanox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d8ec314-5edd-497b-8bda-2747969fa147/vupof.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_off0000ee33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE33 5404 bytes
SHA-256: f4c59abf707d64553e6dca0e06a6101eb9b6c13ed9d448bd77ee36176bebe104
font_01_sfnt_off0001009f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009F 11548 bytes
SHA-256: 16e4fd5ccd38639bc27b2dba8fb559f3187cd8219e1d8c7b249c5c94c4056380

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