Malicious PDF — malware analysis report

Static analysis result for SHA-256 c79d44f2206c702d…

MALICIOUS

PDF

75.1 KB Created: 2021-09-05 23:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: defb71374a673e603db7aa2d6aab68fb SHA-1: d1c666fad3e0e459c7b546ec6befbb430b156f64 SHA-256: c79d44f2206c702d9d1dc2ce3e39d07600c523e7068cdb2cefb60cd9bfe941bf
124 Risk Score

Malware Insights

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

The PDF file contains a link farm, with many URLs pointing to external resources. Several of these URLs are hosted on compromised CMS platforms, indicating a potential distribution point for malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3887

Heuristics 5

  • 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
  • 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://eatorhours.org/e-bussiness/fckimages/file/palijevu.pdf In PDF document text
    • http://sotel-perm.ru/site/file/gizomoseboladakuzenigabed.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210619041849.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/61504784129.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa7eac282f---88047632718.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/vigejojalune.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/37648433527.pdfIn PDF document text
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/sijewisexagamapax.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/466a378d8a18a1ad62937ecdcdfcf250/552224619.pdfIn PDF document text
    • http://greece-ex.com/images/blog//file/50257106036.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/e1fmn0stbun7gqeufkqgoab1hi/geperikenavomolomupur.pdfIn PDF document text
    • https://kede.org/userfiles/file/mavitadevogewuxavabano.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/14238544221.pdfIn PDF document text
    • http://prttour.ca/FileData/ckfinder/files/20210902_5A5613DCE2260F29.pdfIn PDF document text
    • https://beautyreviveshop.com/newerac2c/userfiles/file/birivazagivukexina.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/jukirubogepiso.pdfIn PDF document text
    • http://millecolori.it/images/file/vudenekuxovogilefudela.pdfIn PDF document text
    • http://clinicaveterinariacene.com/userfiles/files/42294921194.pdfIn PDF document text
    • https://cafepiolho.com/uploads/assets/61708485366.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/k52hfpvki48qft7aummmr43kl6/24430181569.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/4f0b7fa72e242fc725416f8c08572a8c/sixepilezulalugupixuvag.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/5e0186eb75edbced83085120c84c9066/wuzefasofeli.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160bf62ed0d7c2---vasepoxe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=allied+health+professional+development+fund+%28ahpdf%29PDF link annotation
    • 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_off0000c37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC37E 22488 bytes
SHA-256: 2d280f5a9f00d0d7af8f9067b3e3cbd253a0dada693bd154ae7e7f2434b420ec
font_01_sfnt_off0000fbdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDB 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_02_sfnt_off000103d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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