Malicious PDF — malware analysis report

Static analysis result for SHA-256 05da053ffdba7df3…

MALICIOUS

PDF

50.6 KB Created: 2021-02-06 15:20:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d06a2932d5672a194cc48fdf330df5b6 SHA-1: afd8644f922630f0f7546812a3758e89b20d52f9 SHA-256: 05da053ffdba7df31721a81b59b0493afcab07ab855ef6839ed654b0ba455544
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are part of an SEO link farm designed to redirect users. One prominent URL, 'https://baarspo.ru/aws?utm_term=4liker+new+version+2018', is identified as a redirector for a 'free-download phishing' lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest an attempt to exploit users through deceptive links, likely leading to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6561

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://baarspo.ru/aws?utm_term=4liker+new+version+2018 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454290/normal_6014a5335ac8c.pdfIn PDF document text
    • https://daxixerok.weebly.com/uploads/1/3/4/0/134000062/679979.pdfIn PDF document text
    • https://rofoxanubojinud.weebly.com/uploads/1/3/2/7/132740779/6062308.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414864/normal_5fcd4413daaef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481527/normal_5fed68781965b.pdfIn PDF document text
    • https://voxonevixes.weebly.com/uploads/1/3/4/3/134383310/01bd55213ca1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459929/normal_5fde33767a0e5.pdfIn PDF document text
    • https://rofewure.weebly.com/uploads/1/3/3/9/133999154/df733e3af4c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391308/normal_5ff965b357665.pdfIn PDF document text
    • http://vsspb.ru/android_radio_tuner_application02pv6.pdfIn PDF document text
    • http://apsdd54gfv.xyz/scope_of_mergers_and_acquisitions_invq81s.pdfIn PDF document text
    • https://kefuvavubuxega.weebly.com/uploads/1/3/1/1/131164002/melobuzad-buxefokelaj-warawovafavejo-rudosew.pdfIn PDF document text
    • http://summerita.fun/tapigovepedoxulugizeuxfg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447450/normal_5feb19deeaf9b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422134/normal_60089b02aa14d.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/federal_employee_hotel_tax_exempt_form_pennsylvania.pdfIn PDF document text
    • http://dojeguxe.rf.gd/kapofijafaniwo.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/92165912785.pdfIn PDF document text
    • http://kipixuge.epizy.com/10288449093.pdfIn PDF document text
    • http://segigeserife.epizy.com/2636320115.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/sivobotunetijutiniti.pdfIn PDF document text
    • http://wezebiwudure.epizy.com/project_issue_tracker_excel_template.pdfIn PDF document text

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