Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c1d5bb75d9d5f93…

MALICIOUS

PDF

85.9 KB Created: 2021-03-17 19:59:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d412343b74ac63faa6bef90ed5526942 SHA-1: 03790068466cc7d039d78bef26856d6fce87bc19 SHA-256: 0c1d5bb75d9d5f933be9ce248bbb544523d84718d1acc99f98557a8710b1ddb2
184 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8506

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.
  • 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://dafemum.ru/award?keyword=bias+in+quantitative+research+pdf PDF link annotation
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    • https://nudabixe.weebly.com/uploads/1/3/4/5/134505388/9323047d7ab5210.pdfIn PDF document text
    • https://miwujiloj.weebly.com/uploads/1/3/4/3/134333625/luweto_degoluxesoxe.pdfIn PDF document text
    • https://kezagoguz.weebly.com/uploads/1/3/4/1/134131769/xuzilezewevur.pdfIn PDF document text
    • https://disovipogazita.weebly.com/uploads/1/3/1/3/131398104/lapok_watarabe.pdfIn PDF document text
    • https://pewituzusab.weebly.com/uploads/1/3/0/8/130874049/6a1ab6.pdfIn PDF document text
    • http://danoguvokapijof.medianewsonline.com/ignou_assignment_submission_cover_page.pdfIn PDF document text
    • https://tapukinag.weebly.com/uploads/1/3/1/6/131606864/2179652.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/how_to_add_camera_to_summer_infant_monitor_wide_view_2.0.pdfIn PDF document text
    • https://vizufawamowimo.weebly.com/uploads/1/3/4/7/134700475/baxodubezov.pdfIn PDF document text
    • https://jidegumot.weebly.com/uploads/1/3/0/7/130776526/6398377.pdfIn PDF document text
    • https://37523d11-79cf-4eb3-ada4-f05de57c71ee.filesusr.com/ugd/275374_fad8666b026249e29c6d569198e93979.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/37220857974.pdfIn PDF document text
    • https://1094d5c0-a920-47c7-a1de-7e2d56a92d84.filesusr.com/ugd/47b1e8_0a9c00a51b074ad5b6d8f2cfaee8a9ea.pdf?index=trueIn PDF document text
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_e9762aff03b7400aab9320a8fe845eea.pdf?index=trueIn PDF document text
    • https://57fc24c6-ba7c-430a-bdae-05304608b610.filesusr.com/ugd/bc9c68_122cf8c14a4043eb88e7dbd1dfceda04.pdf?index=trueIn PDF document text
    • https://6f2fb29c-15f2-4b08-b525-3eb91a7f0a41.filesusr.com/ugd/c3548c_9c5dd60edd12434da8be8c822704cde4.pdf?index=trueIn PDF document text
    • https://db6d3479-2aeb-4a59-914c-1f55c48648c8.filesusr.com/ugd/9f5433_6f61197ea2e941c4a53a50efaa32836f.pdf?index=trueIn PDF document text
    • https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_ef65a12bd52c4b16adf7905d954f9863.pdf?index=trueIn PDF document text
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    • https://s3.amazonaws.com/rekorewexidiwo/52050263897.pdfIn PDF document text
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