Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce86095a7beedb7…

MALICIOUS

PDF

70.2 KB Created: 2021-06-09 08:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f6364eb353a8c8a979e2c14f1d9c0ae9 SHA-1: 294cb8412e707cb20c68a747ab4b8b719e5f736c SHA-256: 9ce86095a7beedb768cf49f3d082ee511ad2fe6f295dff31d80a1543b2cdfea3
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://coretry.ru/pbw?utm_term=carrom+disc+pool+hack+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375909/normal_5fced7928ab4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445331/normal_6047474d4e529.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387699/normal_602b9e91caad7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472479/normal_60434dbca6fd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475580/normal_602527cc7c0c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421614/normal_5ffd8351cadb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474191/normal_6024171a89623.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447434/normal_60480b78a498c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gibabug.pbworks.com/f/67362219977.pdfIn PDF document text
    • http://lulimogosan.pbworks.com/w/file/fetch/144490362/zemogugefaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d1a69e5-728f-47e9-a17a-ca5d6de82083/25406082405.pdfIn PDF document text
    • http://kiletejude.pbworks.com/w/file/fetch/144649740/library_borrowers_form.pdfIn PDF document text
    • http://guronavageba.pbworks.com/f/xesarupawogezegiva.pdfIn PDF document text
    • http://kedefoviraj.pbworks.com/w/file/fetch/144607611/download_twilight_breaking_dawn_part_2_in_hindi_720p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09d08e2f-09fa-4e0f-81f3-e8d32b664a21/best_portable_am_fm_radio_with_bluetooth.pdfIn PDF document text
    • http://nebapelamive.pbworks.com/w/file/fetch/144541857/what_class_of_virus_is_influenza.pdfIn PDF document text
    • http://kuxuraroj.pbworks.com/f/is_the_sequel_trilogy_canon.pdfIn PDF document text
    • http://xuvabufoj.pbworks.com/f/dr_myles_munroe_book_on_prayer.pdfIn PDF document text
    • http://podimil.pbworks.com/f/123musiq_tamil_mp3_songs_free_download.pdfIn PDF document text
    • http://leviwim.pbworks.com/w/file/fetch/144922101/8_pool_free_coins_and_cash.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_off0000d60c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60C 5376 bytes
SHA-256: 70862c73443673b71b80a8d5e391996e452051aa07ac8757e0a2d3e073083c01
font_01_sfnt_off0000e834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE834 10276 bytes
SHA-256: 11c949451a05d90f43d1aec78cd78626e39c203b2edf110eba92afbbd12b4d76

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