Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe125699e82cdb6b…

MALICIOUS

PDF

90.0 KB Created: 2021-07-19 23:35:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8f5473a24b04542256d8be74a362a89a SHA-1: e5d82220d477b71446106f26f94d043c9a5f566f SHA-256: fe125699e82cdb6ba8e8f00ca5eecf6e8b658dc974e01cb12aac6b7cf45aabfe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as phishing. Although no scripts were directly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/60328d0e93e19840e180bff9b9850e22/90343239652.pdf
    • https://addsfly.com/userfiles/file/32590448937.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/5647fc282d537dda0b05b9991011710d/javidefebazuniv.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/7f858a4f10e85ed37ae758a5538440fb/zepubizimawatarenujigor.pdf
    • https://yomadesign.com/userfiles/Proj_Name//files/fitokixobuzidubanefeke.pdf
    • https://masterjobintl.com/ckfinder/userfiles/files/61776674224.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/6ls3vikl4aiu6c9b8hoefo179m/pemepesatasobute.pdf
    • https://ibeguiristain.com/userfiles/files/75143232002.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/h21po2aecqafjlfhd3qrnemhi9/rorodadaf.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16085586d8d2cd---puwajizozoxi.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bd0aa5c29---xegudukanilumu.pdf
    • https://samowar.ch/upload/file/wawaxozagizadopujevij.pdf
    • http://hanasushimenifee.com/uploads/files/6766690352.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/6947b537f0c0df111d2120b04a184127/gopumiwifutadutis.pdf
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/e7ullk747lilioo4ojgevtfq3s/48046905764.pdf
    • https://blugarden.eu/file/suwozaxuwa.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9d86f3991---bigek.pdf
    • http://omonetach.pl/foto/ilustracje/file/kabebu.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8f641cbb03---xajuvodimuzakododegazixe.pdf
    • http://chistogood.ru/admin/ckfinder/userfiles/files/wavototifolederorufo.pdf
    • https://prastosten.se/anvandarbilder/95/files/98696779403.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/08e891a5cc1b8a7d01f6d845489ee643/87740414060.pdf
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/74f9fed62060d775532194d1281c8179/8211324039.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=what+is+the+orbital+notation+for+phosphorus
    • 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_off0000fca6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA6 16792 bytes
font_01_sfnt_off000114b8.bin
491ef33d0ba4407dd1d2bd59ea5a18679fbb0f8720154329b0d24c49e205b29f
pdf-font-stream PDF embedded font (sfnt) at offset 0x114B8 17332 bytes
font_02_sfnt_off00014271.bin
2527cb435e867832d8d58a22f0a084148b902e12107fecb0957f3075d8470f3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x14271 10688 bytes