Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff00475f656fbbcd…

MALICIOUS

PDF

58.6 KB Created: 2021-02-27 13:42:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4fc41083d65d7595fc01a5ac35cdf13f SHA-1: 853ab292baccc28ad4b6ef738f12ab044cf6f5fa SHA-256: ff00475f656fbbcd34c3a741bf6fd42cf7ab00875aec76ce7eec6d596e05c56c
184 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly indicates malicious intent, likely for phishing or distributing further malware. The document body, though heavily obfuscated, appears to be a lure related to technical queries.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8300

Heuristics 5

  • 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 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.
  • 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://midufefew.ru/award?keyword=how+to+remove+battery+on+dyson+dc35 PDF link annotation
    • https://tivurenufetoza.weebly.com/uploads/1/3/4/2/134235987/6062082.pdfIn PDF document text
    • https://xovomono.weebly.com/uploads/1/3/5/3/135345708/203bf67d7bf92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407780/normal_5ffc690f67e41.pdfIn PDF document text
    • https://xurebutira.weebly.com/uploads/1/3/2/6/132681359/7964795.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/hp_officejet_pro_8500_color_printing_problems.pdfIn PDF document text
    • https://mokekisinuru.weebly.com/uploads/1/3/4/3/134366850/4157798.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369655/normal_5fc584a6bc2cc.pdfIn PDF document text
    • https://kusebavizekofuk.weebly.com/uploads/1/3/4/0/134098677/xibatukavav-wafuxevij-mukifesuxop.pdfIn PDF document text
    • https://zisediri.weebly.com/uploads/1/3/1/4/131411341/gosele.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470387/normal_5fdae30e4617b.pdfIn PDF document text
    • https://gexuguxibam.weebly.com/uploads/1/3/2/6/132696321/pofaza_zumavujuxedola_tirerubebu.pdfIn PDF document text
    • http://ruwaxidalemib.iblogger.org/the_startup_nation.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB00 5696 bytes
SHA-256: 70f4dd301c91124ba9e200ab9338b651478b977143b0ee895b574af665b279e0
font_01_sfnt_off0000ce66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE66 10232 bytes
SHA-256: 5882015ffd21e4d1302d03011eafbdcbfe17f7b9185b282a85b4dc70b14e3db2