Malicious PDF — malware analysis report

Static analysis result for SHA-256 c182ff38605abb7d…

MALICIOUS

PDF

69.5 KB Created: 2021-10-14 13:33:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: be0facb83aa6b6df86bd6e342616a82d SHA-1: c9e7c061c2bdb591473024bf861ba4bb4c46cf96 SHA-256: c182ff38605abb7dca5a9f61558dd6dfd6775e6ccc9345ebc14cbb52c1db2256
94 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic identifying it as a link farm on disposable hosting. ClamAV also detected it as a phishing trojan. While no scripts were extracted, the structure and numerous external links suggest an attempt to redirect users to potentially malicious sites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2573

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.elmundodelapiscina.com/ckfinder/userfiles/files/10591158878.pdf In PDF document text
    • http://downtowncincyhotels.com/core_degree/admin/images/cms_imagesfiles/27915151868.pdfIn PDF document text
    • http://e-junghan.com/userData/board/file/92962369443.pdfIn PDF document text
    • http://nhungbaithuocnam.com/img-tvdl/files/84179530225.pdfIn PDF document text
    • https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/82417364725.pdfIn PDF document text
    • https://www.benkorner.nl/admin/library/ckfinder/userfiles/files/73594868874.pdfIn PDF document text
    • http://malifer.hu/upload/file/15025414107.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/19954577377.pdfIn PDF document text
    • http://fertilityupdates.com/userfiles/files/40403145059.pdfIn PDF document text
    • http://pasat.alehotel.pl/userfiles/file/99425437088.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/monikivifusikutizol.pdfIn PDF document text
    • https://niceppl.com/images/file/71865876306.pdfIn PDF document text
    • https://best-label.com/upload/files/tofixerewabosorameluxuvex.pdfIn PDF document text
    • https://henuopack.com/d/files/43051184153.pdfIn PDF document text
    • http://nhactheducthammy.com/upload/files/vadezamaw.pdfIn PDF document text
    • https://impeka.lt/components/com_mijoshop/opencart/image/data/files/nunadujedozali.pdfIn PDF document text
    • http://buren-kompanie.de/userfiles/files/62952696483.pdfIn PDF document text
    • http://snieznik.pl/userfiles/file/86674158730.pdfIn PDF document text
    • http://xn--4k0b43gkwo4gn.com/upload/editor/file/padizi.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/d7e550fd6f4fa9fe8321d17efde67ed4/nijejofeku.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/lomewexugaxujakuzopazu.pdfIn PDF document text
    • https://tresonance.org/uploadfiles/ratisubu.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ec9e1281a0---70336219135.pdfIn PDF document text
    • https://taucaotoccatba.vn/images/news/files/mugazokugumeje.pdfIn PDF document text
    • http://urbanelect.com/userfiles/file/tadubagexaw.pdfIn PDF document text
    • http://synagoge-stommeln.de/ckfinder/userfiles/files/xofafowarububofix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/xPAns0MRe5M/uplcv?utm_term=bein+sports+live+footballPDF 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_off0000dbf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f40a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40A 10612 bytes
SHA-256: 828785fe1846060ad77dad5ded80c6bf1ed3549559a3aa6f2507255372ba9190