Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e151af4c2748554…

MALICIOUS

PDF

85.9 KB Created: 2021-07-15 19:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3edc0a8212f2904781ae8719a913bf0b SHA-1: 01023082478c260c4c2f2786b9f695de530760e4 SHA-256: 5e151af4c27485549d094c88fe6c1827eb8ceb6fa639142c6d575a10c0d55e62
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous external links and the compromised CMS upload links indicate an attempt to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://huntic.ru/uplcv?utm_term=behavioural+approach+to+management+pdf PDF link annotation
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/144786e378c3b1273bbb255b36f4ef22/67163221621.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16075e731edfe9---38068003676.pdfIn PDF document text
    • https://faprosid.com/file/logapidixirevijamejuji.pdfIn PDF document text
    • https://yildizwebpaket.com/calisma2/files/uploads/96453868401.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/lopizomo.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e63c8578cc5---miwaxabasezezowikunesuvi.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/06/files/210628135806.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/c835b937cbb62a0ff510be0ac963ee8e/roxagujukadevorigam.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/93053703839.pdfIn PDF document text
    • http://micruts.org/userfiles/file/45013909058.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e412b540b---dovixiven.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c620b33df5e---rexuwodudotuwifexadawize.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9b811d675---mepejokemawo.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/46a6fe1dc7eea6a1694fb485ee8613e4/xoxisomavefuwuzomufuj.pdfIn PDF document text
    • http://joewhitefamilysite.com/clients/59967/File/gederapuwazazaloma.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/a85ff42df5e2f6949136577a8cdd637d/45898977161.pdfIn PDF document text
    • https://sanvexe.vn/webroot/img/files/86139877327.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/dd2bbc4414efb7aa70fbea23b2f81a2d/16534610999.pdfIn PDF document text
    • https://zzwgjx.com/d/files/jedodefurumakinak.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d3926880782---48192975613.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/lisejuvokedux.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b152155dbb5---sonilofozujupufadozi.pdfIn PDF document text
    • http://karat-dobremiasto.pl/userfiles/file/69642826887.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/1697acbf1d9737b04017ae0b0c6eee1b/66467059471.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://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_off0000edb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB9 16448 bytes
SHA-256: 2b6c177f616c2e0e6ed9ff0d80987dc3808e957c1440fb87b32d4059f582ab48
font_01_sfnt_off00011858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11858 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001306f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1306F 11120 bytes
SHA-256: e21f175a9e7326ff09deb24c4dc63c15c509195ec1c60b5bad4cf504433cd7bc

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