Malicious PDF — malware analysis report

Static analysis result for SHA-256 b10e56d49240ba05…

MALICIOUS

PDF

82.2 KB Created: 2021-05-18 00:29:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: eff4f425c2ac8635dda31e3702414861 SHA-1: d585e9781ee7b7075da19b17388cb478c83499be SHA-256: b10e56d49240ba05a720b1e881f8a578867433ccea1d19068ea8b7ae14e6e232
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains heuristics indicating it is a link farm designed to redirect users to external URLs, specifically mentioning a lure for a 'free license code'. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL points to a domain associated with phishing, likely serving as a lure to a second-stage download or credential harvesting site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/strik?utm_term=free+license+code+for+eye+candy+7 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369166/normal_6053695629e59.pdfIn PDF document text
    • https://lavolobaned.weebly.com/uploads/1/3/0/7/130740571/dujufaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417426/normal_600c77b90cc34.pdfIn PDF document text
    • https://zotagozugub.weebly.com/uploads/1/3/0/7/130739891/f2f1c26.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449771/normal_5ff7578d680a6.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/eec7fb24-5684-415e-b8dd-ecb831c5f31d/jotudukusapij.pdfIn PDF document text
    • http://zotuxegusam.epizy.com/tazelunikiliduwonag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/263ceb7f-3a00-4f27-86d9-e1042eb14547/13633644231.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b8782a4-f283-46a8-a79e-b177de8f71fe/wesukufipot.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/sikevuw.pdfIn PDF document text
    • http://zamoguwudegovo.rf.gd/django_template_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/passive_voice_worksheets.pdfIn PDF document text
    • http://dobejefazari.rf.gd/86028090738.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/83407752949.pdfIn PDF document text
    • http://dekidad.epizy.com/46017730656.pdfIn PDF document text
    • http://zaninoj.epizy.com/danny_boy_free_piano_sheet_music.pdfIn PDF document text
    • http://sasusijuxekexo.rf.gd/dugaxi.pdfIn PDF document text
    • http://towilisok.epizy.com/why_does_my_glock_keep_jamming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adf42bde-1374-403e-bf56-886a13c69a63/45594927338.pdfIn PDF document text
    • http://bebalujoworaz.epizy.com/inari_amertron_quarter_report.pdfIn PDF document text
    • http://xafonabikox.rf.gd/what_is_the_difference_between_press_and_journalism.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA90 5152 bytes
SHA-256: 3133f6412d77c06b7f54224b32a276b00c2aa954fc0d97e193a4db6d5b207274
font_01_sfnt_off0000fc3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3B 11428 bytes
SHA-256: c3e8783b7bbfc687c67202175f3fdd3a350d28ca77768bc71eb9590709ed057a
font_02_sfnt_off0001238f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1238F 16368 bytes
SHA-256: 552e926f59ef53231249b6015cc51882b512f7a40c6b17c25f707dc25a221893

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