Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e07a41e07f5f25f…

MALICIOUS

PDF

139.9 KB Created: 2021-09-06 07:11:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 961430e92acfa7d44e25a0ca9ca5224f SHA-1: 1440dca8a854e1ffc7021bcd1fc7104fe6ce1331 SHA-256: 5e07a41e07f5f25f663c55e77fb918022993e5924aaf0ddea04bd2ae484bc355
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3668

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://asi-filter.pl/files/file/koxigujatufifiluzixunubo.pdf In PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/6fa1acd0ca5a3f827d0b3ce13fb8b320/4814352568.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/82966754346.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/a590015fca5c7f33035c6c74ab182963/nulasa.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/20217242127585688.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/94315514830.pdfIn PDF document text
    • http://romangruszecki.com/uploaded/file/nuperulamafi.pdfIn PDF document text
    • https://www.allduniv.ac.in/ckfinder/userfiles/files/ravimofekuvex.pdfIn PDF document text
    • http://fairway.cc/images/blog//file/wekagakemulabofesogatumen.pdfIn PDF document text
    • http://laureysnv.be/uploads/files/52172586544.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/6oopo1h3m2r32vmo642jkq5r54/zoxuwomiparasawitufizut.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a08df7b8e6c---vilajoligusapimi.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/wasigo.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/poxexavulogez.pdfIn PDF document text
    • http://magiepourenfants.com/images/mediamanager/file/taridibasidojovu.pdfIn PDF document text
    • http://ddrwc.net/clients/869849/File/26820057194.pdfIn PDF document text
    • https://andrejc.si/files/file/1379335330.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1606e5bc1b0e10---lerawumaxuniso.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/1192646077.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/65momkh3j3gjthkhp0jok90587/53342098758.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/32671668929.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/e3c66f99f45e3ea10110e9ff617553ae/zigunisido.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1430c2f44a---87700556365.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3b11ae9b3---72152624737.pdfIn PDF document text
    • http://euroinstytut.pl/galeria/file/berirokikil.pdfIn PDF document text
    • http://novosib-sport.ru/ckfinder/userfiles/files/dixilobenewazewipibi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=paint+manufacturing+process+flow+chart+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E18F 20236 bytes
SHA-256: 506cbfdb9493ffcf46bffc7bf821a71284e95b39d3a6a16c51620b2a807f830b
font_01_sfnt_off0002162f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2162F 11252 bytes
SHA-256: 7aa1f96e1cbf8854c7283264c5e85d5f01026e274ef38163f45e2c6d2f3df061