Malicious PDF — malware analysis report

Static analysis result for SHA-256 c00d65798a6b42ac…

MALICIOUS

PDF

72.8 KB Created: 2021-09-23 07:54:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d5109c92ce3e2a2b2b5f5e4969bbb03b SHA-1: 99095509ae946dc156a509e4c8cbe689c475a349 SHA-256: c00d65798a6b42ac70b3d156b6c8e87f894dab03c9824521c670912a590237e0
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 http://airmon.hu/images/files/besoponaligabelarewibajep.pdf In PDF document text
    • http://essentielles-theater.de/UserFiles/File/3717166270.pdfIn PDF document text
    • http://pytextiles.com/userfiles/file/98461800823.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16147db0240eb3---dezivafoj.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/2cff063f00e5d443c4398f20063fefcf/firujegujakox.pdfIn PDF document text
    • http://cgpharma.in/cote_dor_import/admin/ckfinder/userfiles/files/filufowapox.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/rokusomugozimopagunama.pdfIn PDF document text
    • https://alasclub.gr/neuro/ckfinder/userfiles/files/daxowiwukazovuji.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/161425d4683529---zasukazexibidaj.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/25515676145.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/rowopemewopotitagimosolo.pdfIn PDF document text
    • http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/begozatetusoxarox.pdfIn PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rewupimowezomoxolawepop.pdfIn PDF document text
    • http://ageddfjtj.pretty-match.com/upload/files/51318521886.pdfIn PDF document text
    • http://lindendirect.com/ckfinder/userfiles/files/87438724785.pdfIn PDF document text
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/nanutizogul.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/3e162d5549bc67a607c5ad91084113a0/76158961735.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/zafiseronin.pdfIn PDF document text
    • https://groupunsur3.com/contents/files/57289357659.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/bclf7n788fhhogcalkpfq8ptdr/nawoj.pdfIn PDF document text
    • http://shsuorui.com/uploadfiles/fckeditor/20210919/file/16320685617113.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/nezoboduzozaxovozogeb.pdfIn PDF document text
    • http://mobilahomedesign.com/userfiles/files/19559987890.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/f77b903f6e28158770cf2538a4db2695/5202454612.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/65917301720.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1612eec89ac180---vojesebesig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=chal+mera+putt+punjabi+movie+part+2PDF 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_off0000b93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB93E 10936 bytes
SHA-256: c7198324203890efb14a24c76bffbfad71e7e3475ea61b80c7323c5803b9a410
font_01_sfnt_off0000d225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD225 17056 bytes
SHA-256: 33a65f35410a6f9541dd852c363b795cbbc4c50cc43bb93d9dd369521b500382
font_02_sfnt_off0000fd5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1