Malicious PDF — malware analysis report

Static analysis result for SHA-256 145de19c50c1fc54…

MALICIOUS

PDF

85.6 KB Created: 2021-03-23 18:03:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 84286b061fb7c116ec8de96b0261bd6a SHA-1: feb5edeea332c75b66c9506a46c2bf59ad4ec5c9 SHA-256: 145de19c50c1fc547be52dfd4c38e12ba287c14acac1fc02b472b1fe5df0a08b
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 embedded links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The presence of an invisible link to a suspicious domain further supports this, as it likely aims to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8028

Heuristics 6

  • 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-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://botokaw.ru/strik?utm_term=jandy+pool+heater+troubleshooting+fl4 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391013/normal_60356910e010a.pdfIn PDF document text
    • http://mebets.xyz/what_is_the_4th_industrial_revolutionq86lo.pdfIn PDF document text
    • https://ledijonag.weebly.com/uploads/1/3/4/6/134689342/15d38ed7e59.pdfIn PDF document text
    • https://gadebalemalun.weebly.com/uploads/1/3/4/4/134443756/b416d89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388833/normal_5ff1340283e4d.pdfIn PDF document text
    • http://ketousa.site/pablo_neruda_poetdsd2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422884/normal_604840220c4ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378151/normal_600265280d9a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466173/normal_5fe7ca4699803.pdfIn PDF document text
    • http://com-login8.xyz/password_keeper_printable_sheet5hkuy.pdfIn PDF document text
    • https://pamuguvijokogag.weebly.com/uploads/1/3/4/8/134883264/1561435.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386593/normal_602fc19b8e83b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456676/normal_600022ba4a9b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475016/normal_6038bd2248294.pdfIn PDF document text
    • https://potutipuvo.weebly.com/uploads/1/3/4/6/134680823/9075916.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410004/normal_6037d30a309a8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rivagajogitow.epizy.com/buku_agama_hindu.pdfIn PDF document text
    • http://lesolasate.epizy.com/9861146193.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6995e65-12a9-470f-8a22-776cea454a39/jijowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23ab0347-1303-471e-91e8-6675749fdc2e/apple_airport_time_capsule_1tb_specs.pdfIn PDF document text
    • http://poxotoromerolu.rf.gd/how_to_stop_heat_detector_beeping.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_off0001296d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1296D 5624 bytes
SHA-256: 99d5241852154ca3c7a9b1c82a4d90c34407835fc7875928881f031c7a7c96ad

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