Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec7534b62febb95e…

MALICIOUS

PDF

69.0 KB Created: 2021-07-31 17:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 38b1f15631ce47b7782a7e32ba28496e SHA-1: 898c2bddf765fa3f98b9ef5fb976ac96cca5b28a SHA-256: ec7534b62febb95e610955ae282223b394c3a623920041d8bff3a5b3b505247b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 malicious score 0.7022

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 http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/e5516042adf34ef7d82c914bc5e87d78/saragagor.pdf In PDF document text
    • http://www.parinet.fi/tiedostot/files/navazurakubazidituzifu.pdfIn PDF document text
    • https://naucharts.com/ckfinder/userfiles/files/denereliboduginikokifufod.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/05b486525a6fd6f09f61c254a2621574/xujaladike.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aabd4448a5---81204746457.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/57953545556.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/e2993050ebd91aec9d30b69a8b15a8eb/58660486355.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/fdccd3318c3064c7dcd0a43ccae94343/tonibuvefebides.pdfIn PDF document text
    • https://fotojursa.cz/userfiles/file/pumijirevuzinelevoladum.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/fomigamexubabofufis.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f14964e2d1---15553067480.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/iql58ssgjggmngm4v0tnh5ojn5/xejikamidon.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a6918a141c---vupumajug.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcf60bd2a2---10816577607.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/3806282145.pdfIn PDF document text
    • http://rotarylaspalmas.orgdocumentos/file/36261864184.pdfIn PDF document text
    • http://ranjitabiswas.com/userfiles/files/7652866345.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1248dd5b51---zizirufob.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d366c54b2---50077277239.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160982308b015e---xelelufurasuxukitux.pdfIn PDF document text
    • http://nyitotthaz.hu/userfiles/files/55645193066.pdfIn PDF document text
    • http://kielcenoca.pl/files/file/nexofubatiwegadav.pdfIn PDF document text
    • https://doublehair.center/upload/ckfinder/files/zurixagugolerubazekuje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=como+fazer+arvore+de+natal+no+little+alchemyPDF 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_off0000e4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0A 10844 bytes
SHA-256: 6d40c32014adce2d3f165bda5e666de952f511f6c9ebf914181b64eee700ae7f