Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eda5d1a818bcd0e…

MALICIOUS

PDF

84.2 KB Created: 2021-09-07 04:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4b651698ea07cf3ed5c8e72590259bb9 SHA-1: d080579707a65a645ab9ae7871977a80afc92ca0 SHA-256: 9eda5d1a818bcd0e4d9cf06aa3def40290fd895d1e244d5e55f0e4405696c62c
96 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable domains, indicating a link farm designed to manipulate search engine results or distribute malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment that it is not benign. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://serting.eu/userfiles/files/nozekasovomazezis.pdf In PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dac70b786e---lazogoxawefixasejepix.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/wodaxuzanojufimoja.pdfIn PDF document text
    • https://khanikango.in/file/21223609915.pdfIn PDF document text
    • https://doublehair.center/upload/ckfinder/files/97628947619.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/nubuxunisudararobit.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/43782115699.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1a345b745---dujovixuraxuzikejune.pdfIn PDF document text
    • http://rulada.by/upload/editor/files/41664761672.pdfIn PDF document text
    • https://lotusmarinevn.com/upload/files/43075961086.pdfIn PDF document text
    • http://famillespourstarlight.com/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/vibofujur.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16072147a2754d---viniwut.pdfIn PDF document text
    • https://fepango.org/ckfinder/userfiles/files/65021804761.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160965fb60a774---10265393494.pdfIn PDF document text
    • http://drsuthichai.com/userfiles/files/5242073010.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/licq0nuj8tpnke7rhvptpkp5dh/92086108584.pdfIn PDF document text
    • https://zebcom.in/userfiles/file/46861207507.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3ad7384d8---bamokafipi.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/48455048822.pdfIn PDF document text
    • http://ikoi-es.club/yamituki-n/uploads/files/2534999286.pdfIn PDF document text
    • http://toddfamilyreunion.com/clients/4/48/482e924d5a052aa4a0c13eb8a30e0bc8/File/dagitiru.pdfIn PDF document text
    • http://shopcode.ru/uploads/file/jamusexosove.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/84065778967.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=cours+sur+le+guidage+en+rotation+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000def6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF6 10804 bytes
SHA-256: c80ad2455f0f2c996c6e22ed5ef9ead55d331122889f3c437252f6130886f888
font_01_sfnt_off0000f7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C8 20192 bytes
SHA-256: 2397ccb012d6fbfe9a30290e1f027f3f90a6e75dd7575ccbf1585d556cf01670
font_02_sfnt_off00012b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1