Malicious PDF — malware analysis report

Static analysis result for SHA-256 32efacb3c7922b58…

MALICIOUS

PDF

83.1 KB Created: 2021-09-19 22:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 875ff56a72affc7cced6b8d83d393d9e SHA-1: 55c77d493beace5e1fc33e5e7f45c9734166373f SHA-256: 32efacb3c7922b5872cb0259220727e808b4467086746873ffa97611657480af
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the links and the detection as a trojan indicate a high likelihood of it being used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://archism.ru/uplcv?utm_term=how+to+get+every+skin+in+fortnite+glitch PDF link annotation
    • http://studiomuraca.eu/userfiles/files/58226459222.pdfIn PDF document text
    • http://meijialx.com/ckfinder/userfiles/files/vajexobenosuwaf.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/161444dfbc7296---jopimelinolijumuladur.pdfIn PDF document text
    • http://costruzionibulagna.it/userfiles/files/livumopibubageji.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/56299961727.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0a3cd6f71---72950736875.pdfIn PDF document text
    • http://kapsalonindex.nl/images/uploads/geten.pdfIn PDF document text
    • https://parisnordmedical.fr/docs/file/82484814170.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/8ba34aced1ccf6e4d70a99d7bbee09bc/51049200870.pdfIn PDF document text
    • http://weingut-suppan.at/files/30571815611.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/sijugufelugediruluw.pdfIn PDF document text
    • http://a1climbing.com/userfiles/files/likusibumudiniramimafara.pdfIn PDF document text
    • http://jeykrishnaclub.com/images/file/42565116755.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/d3eeefae169f7ed2c4b98dae0575ea88/vovavugudazef.pdfIn PDF document text
    • http://gamebonda.com/ckupload/files/67116633041.pdfIn PDF document text
    • http://hosungtour.net/FileData/ckfinder/files/20210916_0C3642DA263F12DA.pdfIn PDF document text
    • https://loyallcanada.net/editor_files/file/kuxovi.pdfIn PDF document text
    • http://bwc.lt/i/96918614703.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/50709488119.pdfIn PDF document text
    • http://sithome.com/upfiles/file/20210918025402.pdfIn PDF document text
    • https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/tagogubizekebekapowezi.pdfIn PDF document text
    • http://sensor4you.com/fckeditor/editor/filemanager/connectors/php/fckeditor/upload/202109/file/kunitowijurasikazikoxug.pdfIn PDF document text
    • https://semut73.com/contents/files/91284565305.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_off0000dcc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC6 18632 bytes
SHA-256: 44228ec79747d53dcde2c30084616f3286d2e8ffe5695d72943de3cadfcaae11
font_01_sfnt_off00010d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D75 10800 bytes
SHA-256: 4d7e4e99e04e2439712026f0d89845fa24ea325f5941b23f55cc59b10eaf8edd
font_02_sfnt_off00012652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12652 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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