Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ccb0c3142c77a6…

MALICIOUS

PDF

68.5 KB Created: 2020-11-29 13:59:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 813196cdbe216dd14589e4deda30ee95 SHA-1: 1fa39fe92e37b78bd8344618ebfdd2a96a75c10c SHA-256: 14ccb0c3142c77a661967c0d4e9df2c432e4425fdbb18a5378212aca5ff15edb
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffi.ru/aws?utm_term=comparing+numbers+worksheets+for+kindergarten+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5fb3dafdd7750.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385202/normal_5fa471735318d.pdfIn PDF document text
    • https://xudidetopos.weebly.com/uploads/1/3/4/5/134579215/41ac803.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f9c2f444e15b.pdfIn PDF document text
    • https://pebetojakudasud.weebly.com/uploads/1/3/4/8/134879391/vobatepazo-dufaxazun-bepoluposo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445877/normal_5fc324e21e25d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402949/normal_5f9325c096954.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/laradusa/abvp_songs_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8e7dc07-54c4-45aa-9001-f8a96fded084/jukaki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ec7afb5-f969-4dee-b592-2a5ad2617933/best_ticket_websites_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dbe8b3c-b984-433c-83b0-81de1501716e/70199485647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83d41c4c-df0c-4348-afc7-85383efcc0de/dune_buggy_200cc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2416464-a4cb-427d-b2dd-f4046aac7255/78674774893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dc29f5f-3476-43c8-b94e-881d531bdecd/download_film_si_doel_the_movie_2_in.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/eu_gmp_guidelines_annex_1.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/bepibav.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_off0000ce56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE56 5624 bytes
SHA-256: 51578eb2d37d575b288cae76836a9357194e349fa6d00c9957e8fc584097545a
font_01_sfnt_off0000e153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE153 10504 bytes
SHA-256: 528fdaae073ac0778b741c57dda613b6f30f5e066252d93b9e25050b889d4f4e

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