Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2bfc7d3561bcba5…

MALICIOUS

PDF

69.6 KB Created: 2021-03-03 23:21:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a840250573eadf2de9d94b1a34f093d1 SHA-1: cbe2b4acdad0bd7d32a96b39f8ae7752bd033135 SHA-256: b2bfc7d3561bcba5807b88fe8899aa21b5fa17f82ae3d1ecb2d77d00dc1c2338
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity, likely leveraging JavaScript for exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9639

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 https://golowaki.ru/aws?utm_term=replace+kidde+fyrnetics+model+1275 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424400/normal_5fdbf55d77669.pdfIn PDF document text
    • https://motadonikedubi.weebly.com/uploads/1/3/1/8/131856170/18f7de0529e6.pdfIn PDF document text
    • https://sefuxogam.weebly.com/uploads/1/3/4/4/134466031/a3c364e2.pdfIn PDF document text
    • http://kostlike.site/86405923250d72n4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415951/normal_603a725d7f12e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489848/normal_5fee1f592311d.pdfIn PDF document text
    • http://olymp-trade.top/63705077677lqps.pdfIn PDF document text
    • https://tanaxafim.weebly.com/uploads/1/3/4/5/134501517/8642318.pdfIn PDF document text
    • https://revafabeku.weebly.com/uploads/1/3/4/7/134708131/3cab0a.pdfIn PDF document text
    • http://shopwithsale.website/dm_guide_5e16mrj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486565/normal_6000db1817b89.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sapofikij.epizy.com/myaccountinglab_homework_answers_chapter_2.pdfIn PDF document text
    • http://buzapodux.rf.gd/chrome_proxy_settings_android.pdfIn PDF document text
    • http://tozurome.epizy.com/makubovo.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE832 5860 bytes
SHA-256: ca0c064422b53d1434d06a70e9e5a78ca7e205c6a43cf1953ad3ef0d87350ac5