Malicious PDF — malware analysis report

Static analysis result for SHA-256 680fb6b20050b8b0…

MALICIOUS

PDF

80.3 KB Created: 2021-05-16 19:34:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 133e78a7494e331687358dcb387d6793 SHA-1: 9c5e7e203c484c4153595af0f7376140dabe4d65 SHA-256: 680fb6b20050b8b0b67787b331b11100d357e71520d605abb0171c8b99f8d4c7
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 0.9992

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://xajibur.ru/strik?utm_term=jumping+jacks+benefits PDF link annotation
    • http://vpntop.info/katowakixozalamunebudifebyr31.pdfIn PDF document text
    • http://chaptejvxz.fun/how_to_get_free_xbox_live_codes_2020k9sx5.pdfIn PDF document text
    • http://fbdirect.site/59616127075yc0pl.pdfIn PDF document text
    • http://nyvelsets.online/boye_long_loom_set_patternsx6ut3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368225/normal_5ff36acbd2ed6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487641/normal_6035bc3e892f4.pdfIn PDF document text
    • http://gmetry.online/51708461431jp2wr.pdfIn PDF document text
    • http://sks-expertiza.ru/98547470071ecxkw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428035/normal_6002e72cba657.pdfIn PDF document text
    • http://hookup750.website/88325420601zwy66.pdfIn PDF document text
    • http://rezonansmusic.com/shadow_project_bomberovg3g.pdfIn PDF document text
    • http://trysoda.club/center_point_scope_6-20x50szrqx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389108/normal_600dcd3b8947a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zagebixomibolo.rf.gd/pamenodirefamibuwuk.pdfIn PDF document text
    • http://vejobewibibir.epizy.com/faredorominusajenuvaw.pdfIn PDF document text
    • http://nasukenapab.epizy.com/deep_would_you_rather_questions_buzzfeed.pdfIn PDF document text
    • https://814cba0f-f649-4223-bfe6-7884e6e02b9d.filesusr.com/ugd/c1108c_f283ef84c14e453687c8fd1f44ac8db4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e572a4c-14f9-4de8-86d0-e49b0a0931b4/cancion_de_fuego_y_hielo_libro_1.pdfIn PDF document text
    • https://4cd5eafb-d261-4666-a528-29b55b1676c1.filesusr.com/ugd/8dde66_246a7ca1ce1e4c818dc2c02c212c4a1d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfefbfa2-7900-475d-b4df-936283181192/94537324169.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a6dbbba-bffc-4f44-8f09-4648d171c928/27083756915.pdfIn PDF document text
    • http://mujusamufi.rf.gd/58779676715.pdfIn PDF document text
    • https://128fc002-9ed4-4a8f-9a6b-83b43563a9ed.filesusr.com/ugd/6812d7_27247704f95b43efb650e12572b503aa.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_off0000fbea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEA 5476 bytes
SHA-256: df4a741390d656d41c72386e92540ddfa3f834b7177bda46b750fed41b058dd4
font_01_sfnt_off00010e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E87 10388 bytes
SHA-256: e14304368e23bd326fe07d2be290af54d59f24c1fb773daa8bfb041313f43b54

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