Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2a176f3e49eb36c…

MALICIOUS

PDF

86.6 KB Created: 2021-06-30 05:08:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 87dbeed14152de0607937f03a79d4666 SHA-1: 5c8d2221bdf5804282182d77ba35fa56d1fd5c1a SHA-256: c2a176f3e49eb36cd7fa6b9010a8cacfdf1f4cae16f8645cb22aea5150722038
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous external links, with a significant portion pointing to compromised WordPress upload storage, indicating a potential phishing or malware distribution scheme. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious link farm attack pattern. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://monamifrance.com/FileData/ckfinder/files/20210624_AC9B20DD65BDD21F.pdf
    • https://ludifrance.fr/userfiles/file/73503927953.pdf
    • http://www.serenissimaservizi.com//files/19285594610.pdf
    • http://vitalenzyme.com/uploads/fckupload/file/80945822394.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9855e9da4---vametufujazulokowote.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a2fc7eb9b---roduxutepawezazas.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/9cbfaeb124b1605d71405849aac3c931/24225568508.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfbdc1609f---51159816460.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/03ghqfpk0gujlbsdbrp6q0err7/patajolofigezubukosul.pdf
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/c80fdec544049a1ada7db1c32c41b0a8/60626734042.pdf
    • http://aftckwt.com/uploads/file/5375944338.pdf
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/gbeclpmqph99a00r3hg75kvub1/73674652976.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/f304111ee939f02ab6022a85cac876ec/44622294416.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5b6d81c07---85105528329.pdf
    • http://omonetach.pl/foto/ilustracje/file/53761759928.pdf
    • http://kopdesign.nl/userfiles/file/14569346609.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16095f82512fbc---53678675218.pdf
    • http://www.kickcommerce.com/userfiles/file/zixilikot.pdf
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/60121791615.pdf
    • http://myblindz.com/fck_user_files/file/52652670804.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/3f4e28a9b2572296c7ee2b2df52f85ed/72059991366.pdf
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/e41dfe0753e49f114b091f68c92402fe/guzatipabaf.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc96945acb---15175886223.pdf
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/nina838u30dnn6qciok2ioo09k/21501402008.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/4238d483833a868c127c1206f31954c4/5536150358.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=rules+of+the+road+study+guide+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edd1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD1 16792 bytes
font_01_sfnt_off000105e3.bin
ef1ced6df6efa3a302afd3333cbf2c85bb3ff3ec9acebf52cb5ee0ebf9e0866f
pdf-font-stream PDF embedded font (sfnt) at offset 0x105E3 17508 bytes
font_02_sfnt_off00013399.bin
60afce25475771d40526c161827fc2e02a007ceb528f8d70581ddaae9bdec2e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x13399 10976 bytes