Malicious PDF — malware analysis report

Static analysis result for SHA-256 4641e0298e227cdf…

MALICIOUS

PDF

58.6 KB Created: 2021-02-24 14:26:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 40b4b5be53c53018210012a00591a2ef SHA-1: 42ef0a8d93487c4b29123403e6c29f43e37da966 SHA-256: 4641e0298e227cdfa40b1ce58cb80b3248327db2b91b86f8a5fddabdbb2ff987
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it functions as a link farm designed to redirect users to potentially harmful websites. The document body, though heavily obfuscated, appears to be related to search terms, reinforcing the link farm or SEO manipulation attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=ejemplos+de+pronombres+relativos+en+ingl%25C3%25A9s PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383586/normal_5ff8c442d68bd.pdfIn PDF document text
    • https://kuxijixa.weebly.com/uploads/1/3/4/8/134856984/627113.pdfIn PDF document text
    • https://miwevedadig.weebly.com/uploads/1/3/1/4/131437981/xixitezipig.pdfIn PDF document text
    • https://tubidurifubadas.weebly.com/uploads/1/3/4/8/134885002/ec5909.pdfIn PDF document text
    • https://kibodoru.weebly.com/uploads/1/3/2/6/132695707/jifaraj.pdfIn PDF document text
    • https://sitakubijilu.weebly.com/uploads/1/3/0/7/130776110/zaxasigudi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370264/normal_5fce82988c7d0.pdfIn PDF document text
    • https://puxizabub.weebly.com/uploads/1/3/1/4/131406372/3594985.pdfIn PDF document text
    • https://zuzesewijolane.weebly.com/uploads/1/3/1/4/131406438/5650286.pdfIn PDF document text
    • https://femukigiterabe.weebly.com/uploads/1/3/2/7/132740239/9287410.pdfIn PDF document text
    • https://xumebarukez.weebly.com/uploads/1/3/4/6/134687090/fazupedagojof_kagorido.pdfIn PDF document text
    • https://renepavavoz.weebly.com/uploads/1/3/4/0/134012855/a1c88.pdfIn PDF document text
    • http://favuzokusom.rf.gd/chandrakanta_novel_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/77586780700.pdfIn PDF document text
    • http://bowudizukeb.epizy.com/chilling_crossword_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/xemuxexijelekagamagolomox.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/hotel_invoice_template_india.pdfIn PDF document text
    • http://zimemotom.rf.gd/how_to_become_an_aa_approved_garage.pdfIn PDF document text

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