Malicious PDF — malware analysis report

Static analysis result for SHA-256 755c765d5bb3fe09…

MALICIOUS

PDF

48.0 KB Created: 2021-02-20 06:59:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 166278c75b1cc097da266278ffff7afe SHA-1: a90a8fb68386e3d73da886b25c24ac6ecb7c2cd0 SHA-256: 755c765d5bb3fe09cb34c181b9a797eefd1091a70ef1bb1091302991d0f172ae
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains strings related to 'financial peace university app review' and 'wkhtmltopdf', suggesting a lure to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8618

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=financial+peace+university+app+review In PDF document text
    • https://bowetupivivuz.weebly.com/uploads/1/3/1/4/131437724/bojigo.pdfIn PDF document text
    • https://vidatizotasajad.weebly.com/uploads/1/3/4/0/134017381/juxaluduzafole.pdfIn PDF document text
    • https://cdn.sqhk.co/penazavoxu/OMih6Fz/dupesitazo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454182/normal_60118b805f9b2.pdfIn PDF document text
    • https://ronabamipiboti.weebly.com/uploads/1/3/4/5/134598089/birijuful.pdfIn PDF document text
    • https://zekilunadaxidub.weebly.com/uploads/1/3/4/6/134631079/716606.pdfIn PDF document text
    • https://cdn.sqhk.co/tenokesime/JQgcfji/slots_lv_casino_no_deposit_bonus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486346/normal_60305f8fe42a5.pdfIn PDF document text
    • https://cdn.sqhk.co/pegidago/TTJ6Pij/skateboard_party_2_pro_download.pdfIn PDF document text
    • https://simepatu.weebly.com/uploads/1/3/4/2/134267103/e6418ab31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406464/normal_5ff3921450c88.pdfIn PDF document text
    • https://cdn.sqhk.co/kosojilufut/hbMz3fb/kafadit.pdfIn PDF document text
    • http://powerhdniy.space/rozaxarv6bz.pdfIn PDF document text
    • http://fenigubigona.epizy.com/bonixekugeware.pdfIn PDF document text
    • http://wumujofagitamix.rf.gd/kproxy_app_for_android.pdfIn PDF document text

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