Malicious PDF — malware analysis report

Static analysis result for SHA-256 11a54f0e45b80178…

MALICIOUS

PDF

55.7 KB Created: 2021-03-25 10:09:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 7828c979f2c0b9fc0b88095c19431782 SHA-1: 6fa081539b756c48a620463383112948c4be445c SHA-256: 11a54f0e45b8017856bd004fb6873755d5270c170786eccef0e1fd4983922a36
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious content, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8321

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://fokemale.ru/award?keyword=calidad+total+pdf+senati PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453901/normal_603bbc1a28657.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491151/normal_600aa54fc911d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418584/normal_6022836285031.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421365/normal_60024a3a87667.pdfIn PDF document text
    • https://xijapesulole.weebly.com/uploads/1/3/4/5/134588017/7902256.pdfIn PDF document text
    • https://serarabasujuz.weebly.com/uploads/1/3/1/6/131606617/d159d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490125/normal_604fca2565387.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372087/normal_6032befa41e9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385214/normal_6032d1a338f00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386349/normal_60401ac51f739.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450336/normal_5fc5d13519a34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366620/normal_6033db235dd74.pdfIn PDF document text
    • https://juguzitusiketi.weebly.com/uploads/1/3/4/3/134372303/1606fe6c.pdfIn PDF document text
    • https://femovoba.weebly.com/uploads/1/3/0/7/130775826/mikewezabe_mewelef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460686/normal_5ffb2eb42a8bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383699/normal_6041b91ec7ce6.pdfIn PDF document text
    • https://libezitotew.weebly.com/uploads/1/3/4/6/134603607/1575209.pdfIn PDF document text
    • https://af6bd0e1-9fb2-4c52-b6e5-df6188d17e94.filesusr.com/ugd/771d18_9eabfee923394462bf7cc8c9ed5325f9.pdf?index=trueIn PDF document text
    • https://527ed197-5826-4432-9c89-449afa9d705e.filesusr.com/ugd/65ef70_cd8f38289eb24d21901896a9272f2e04.pdf?index=trueIn PDF document text
    • https://8d94caac-80d5-4f6d-a73a-04ed47837dc1.filesusr.com/ugd/585b1d_cb2a1b6b66a84befbdf540432a35de26.pdf?index=trueIn PDF document text
    • https://05efeaee-ea5b-4dc8-bddc-a5098cc0dcbd.filesusr.com/ugd/c06c30_4abf8b597caf4325bfd880beef31332a.pdf?index=trueIn PDF document text
    • https://c6506652-bf5e-4f52-be36-03dbfaede22c.filesusr.com/ugd/f74919_4ddf8ff5c1094a6c991d2b2abaabda43.pdf?index=trueIn PDF document text
    • https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_fd35b0f28477400ca54aa0c270c5d6ae.pdf?index=trueIn PDF document text

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