Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaf97414cb286610…

MALICIOUS

PDF

91.1 KB Created: 2021-07-20 18:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: df73257945993529b7be652f059566c4 SHA-1: 02755d8c8ca80ac41155dadf3f9238b47e1262c5 SHA-256: aaf97414cb28661037f6360a0464fa5d18cf393a9bc8df87fe28967daab34ff1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The ML classifier and heuristics indicate this PDF is malicious, functioning as a link farm. It contains numerous links pointing to external websites, many of which are hosted on compromised CMS upload directories or appear to be on disposable domains. The primary goal seems to be directing users to these external sites, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://mavachhaiphong.com/upload/files/zoxigigagokomalu.pdf In PDF document text
    • http://augustaelectricalwork.com/editorData/file/gesabepigarateresukem.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/7236ea8c4f8fbb3779b07a96e84a99d9/5889039818.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/f695c3810584d09fedd05e84aef49adf/gebugureli.pdfIn PDF document text
    • http://czechdidgeridoo.com/admin/upload/file/69704573648.pdfIn PDF document text
    • http://asfcursillo.com/clients/879797/File/36419661240.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc0ad76caf---lobeluve.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c04cd5375ea---79214896007.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/mdv36554e14uqsrdojligifj6o/83351480974.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a1df3e75c09---15758861827.pdfIn PDF document text
    • https://kanalprofi.at/UserFiles/file/fujeredakobir.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/ce851a95863797c12e6a491015df0ea6/fedenudegelifikowofe.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081792c71a71---56044321711.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/12615680061.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa1d2bb257b---gubajevu.pdfIn PDF document text
    • http://charivne.info/images/file/87856174224.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/083584736f3ce5b5ab6fa328217b8676/58873389523.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/7701668309.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160ae26998b7a2---65324648503.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160b87da55e76b---bekuvokav.pdfIn PDF document text
    • https://everestart.com/images/stories/file/zilafikuvikirabag.pdfIn PDF document text
    • http://shsclassof1959.com/clients/a/a7/a7a82b2a6025f7fafce5d77be70bf845/File/vaguvewudu.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b288ca9980---teluridakigolivu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=weep+out+meaningPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB62 18556 bytes
SHA-256: cdf342e2295c7c6f46e9a658fedb59fac4a465498bc27e816ebb5da0b3e71338
font_01_sfnt_off00010bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBE 10372 bytes
SHA-256: d984a4dd0a583f9dd3138d6a4e3940fc86cdbda9dbdf163a2da24208f6aa0bbd
font_02_sfnt_off00012324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12324 9996 bytes
SHA-256: 2cc79f6064b0e9c79f8a5cdb43d590439933eabfddd08b44a56c0f639b1e63df
font_03_sfnt_off00014448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14448 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.