Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a7d6762443cacee…

MALICIOUS

PDF

75.3 KB Created: 2021-06-10 16:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: bf2f9912577e9c8d6ebfd3dfd20a7bcd SHA-1: 271e7bfd7c9a50743ce81f8a5eefa84961583478 SHA-256: 0a7d6762443caceed1599add8c8056376a3ec84bf221dcb0c4b98470f13182d1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious by an ML model. It functions as a link farm, directing users to various compromised websites, many of which appear to be WordPress installations. The document body contains text related to 'Attack on Titan season 2 1080p', suggesting a lure to attract users searching for media content. The numerous embedded URLs point to potentially malicious or compromised hosting locations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://infrive.ru/uplcv?utm_term=attack+on+titan+season+2+1080p PDF link annotation
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9a3db986c---87440373718.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/8953376148.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac26be86534---58815632234.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/66199971310.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16086a25df2d05---ralebutuxajuz.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/6dc7631f25122e222d0ef9957d78966c/13338667510.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160739ee56c7e4---xutasuranedufise.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080831e9cdb3---fobosezelusu.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16085102ed4d30---xudoda.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb5394c74f---99024767720.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-20/20210520005506924186.pdfIn PDF document text
    • http://landia-print.com/pdir/file/81456493778.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/36582574457.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/e40159b87af7fc60e534e6a2ce365bb0/4559119761.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091390b0dfb8---jepemebogifo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD742 4120 bytes
SHA-256: 4bc9a9987a5029bc3f5017768e9bff17968a27b5842a01053f372f97f3118e91
font_01_sfnt_off0000e5e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E4 5372 bytes
SHA-256: 1f8182b88c1b9380a3662282168051c187b1042ad69d0e8bbcf8256cb08e7c62
font_02_sfnt_off0000f84a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84A 12204 bytes
SHA-256: 5a1107a02a50d85e91ba60d62c2ba355713af2378aaf7d16196f750f9a54cb09

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