Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebb0beed8d0a1161…

MALICIOUS

PDF

74.9 KB Created: 2021-09-13 16:58:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c0ae0cfb7a56dd5fd3249f6f6e622b4a SHA-1: 9c0d81c9644d82875a09132bdcc56b87a1ba1130 SHA-256: ebb0beed8d0a1161c517c31fdc9a1e6171283155222c62c6b1d292bcd20494bf
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards an attempt to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7561

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.ssc-ras.ru/ckfinder/userfiles/files/6148655946.pdf In PDF document text
    • http://zl369.net/userfiles/file/saxivelevumixefafej.pdfIn PDF document text
    • http://shturnev.com/files/foFKED/file/79062953498.pdfIn PDF document text
    • http://amirmazandaranihospital.com/ckeditor/files/files/jibuxazunutabegixetuvig.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/2085033206.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/4541151898.pdfIn PDF document text
    • https://www.nvsrolko.org/ckfinder/userfiles/files/17965459294.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/5165dd0c0b23ae61777c234689aad6d3.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133d66ff3e5a---xosexininowukalekilawis.pdfIn PDF document text
    • https://champion-osk.pl/userfiles/file/1847945285.pdfIn PDF document text
    • http://koppeika.ru/userfiles/file/80147235325.pdfIn PDF document text
    • https://sandipkumardutta.com/ckfinder/userfiles/files/82405921079.pdfIn PDF document text
    • http://precisionsurgicalworks.com/alpha/ckfinder/userfiles/files/63267295907.pdfIn PDF document text
    • http://ovecollection.com/royal/admin/images/products/file/pozisawi.pdfIn PDF document text
    • https://maintogelonline2.org/contents/files/rejuwikidudigurujimi.pdfIn PDF document text
    • https://volandovia.it/public/fileeditor/file/75443275049.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021091122240573499.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/ripavu.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog/file/94582282281.pdfIn PDF document text
    • https://www.sudoku-cool.com/ckfinder/userfiles/files/gosimire.pdfIn PDF document text
    • http://obkladlazby.cz/userfiles/file/54341790726.pdfIn PDF document text
    • http://bxbrdh.marketsearching.com/upload/files/zizekavogo.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/navuzip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=the+conjuring+3+full+free+moviePDF 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_off0000e0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EC 18212 bytes
SHA-256: 6a4ee3cc3c57dcacc3a4e19d3272948df7142fe7e88eb7f54e10840c89f008ab