Malicious PDF — malware analysis report

Static analysis result for SHA-256 24732af64f5dbde8…

MALICIOUS

PDF

65.3 KB Created: 2021-06-01 20:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b05c6d3053655c0c643b4269b51d963 SHA-1: 29fbd8a12d6ef7f45593c6cba2e60700e6a98c22 SHA-256: 24732af64f5dbde8fdad7e4e3fe65e0d5f2f1c77ce8484200a0360220c7507c5
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files hosted on various platforms, suggesting a link farm or a method to obscure malicious destinations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs are used to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9263

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crysiq.ru/pbw?utm_term=stand+by+you+rachel+platten+lyrics+clean
    • https://cdn-cms.f-static.net/uploads/4383138/normal_6045215a7d41f.pdf
    • https://raketesi.weebly.com/uploads/1/3/4/6/134632322/segofapum.pdf
    • https://cdn-cms.f-static.net/uploads/4365628/normal_600ea7173e768.pdf
    • https://bipovubukixepev.weebly.com/uploads/1/3/2/7/132740720/9618c8.pdf
    • https://static.s123-cdn-static-d.com/uploads/4471235/normal_60b000b73eaba.pdf
    • https://cdn-cms.f-static.net/uploads/4486743/normal_60437a97476d0.pdf
    • https://rilopogikumifo.weebly.com/uploads/1/3/4/3/134320310/suwokajekazuz-xawex-tomosisofusopuf.pdf
    • https://fuwivofopotafuj.weebly.com/uploads/1/3/5/3/135388640/risijifibixotuluj.pdf
    • https://faxasuxudoxo.weebly.com/uploads/1/3/2/6/132695360/8103377.pdf
    • https://dajixogemozuv.weebly.com/uploads/1/3/1/4/131438707/8593458.pdf
    • https://faloxumotib.weebly.com/uploads/1/3/4/6/134646793/5940382.pdf
    • https://cdn-cms.f-static.net/uploads/4498971/normal_6056af643101e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ridelox.pbworks.com/w/file/fetch/144467811/63065883348.pdf
    • https://uploads.strikinglycdn.com/files/05c4effd-988e-4ca8-817a-21bb3e97a140/john_petrucci_rock_discipline_tabs.pdf
    • https://uploads.strikinglycdn.com/files/cc227902-71b6-42d5-b4b5-75e270448903/37084292216.pdf
    • http://lekuzax.pbworks.com/w/file/fetch/144417405/sexotawo.pdf
    • https://uploads.strikinglycdn.com/files/fade1454-ea3f-4989-8dee-e04b656622cd/vilib.pdf
    • https://uploads.strikinglycdn.com/files/4c969408-9913-4272-927e-dbbdf43c1e94/miles_and_huberman_1994.pdf
    • http://nerobedevu.pbworks.com/w/file/fetch/144457689/super_bomberman_2_snes_rom_espaol.pdf
    • https://uploads.strikinglycdn.com/files/342676b4-47d2-424f-a63a-e3c0aba753b1/rabaxulalokolisuz.pdf
    • http://xodelow.pbworks.com/f/map_metro_amsterdam.pdf
    • http://gufabewa.pbworks.com/w/file/fetch/144456003/game_of_sultans_vanquish_calculator.pdf
    • https://uploads.strikinglycdn.com/files/70685c7c-eea2-4b93-889b-54243b0bf050/toefl_speaking_practice_questions.pdf
    • https://uploads.strikinglycdn.com/files/dac7d3e6-9717-47a6-9698-5bbf86899aed/frosty_the_snowman_2005.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8e7.bin
e73476f7b3210ffc688e90f85cf3136c6adaf3bf738e4c5adb56031d5c88dcd6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E7 5508 bytes