Malicious PDF — malware analysis report

Static analysis result for SHA-256 f36031f9aeadc2d4…

MALICIOUS

PDF

65.4 KB Created: 2021-03-24 12:52:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: caa670ac8e36acd0899f6fb94934a397 SHA-1: 121a1779f836f480224abaa0490ee33dacf47419 SHA-256: f36031f9aeadc2d4a4afff1dfe2df8bda5812ce2de4ffafda3ea7639b24a37b5
184 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.6626

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://mezovuduw.ru/award?keyword=very+bad+things+ilsa+madden+mills+pdf PDF link annotation
    • https://cdn.sqhk.co/jeporikate/iudiiVN/xopudi.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/fggiiIy/hide_or_hunt_server_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95147613-39cd-48de-9791-67e9dbeb1261/maytag_appliance_repair_green_bay_wi.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/afnor_catalogue_formation_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33009182-cf97-4f48-a842-7a7b7ea0e215/duniwowilisub.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/kolasamapur.pdfIn PDF document text
    • https://8aefc570-8454-48c3-bb63-d4d1067b7ce0.filesusr.com/ugd/5c9621_c676137ae79149b594b4befcb6f73a13.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad40a128-8163-454b-8982-e8e13dc53177/galodanapodaxun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ffafc78-e02e-4027-a3d3-dd775d1bc37d/verbs_form_list_with_meaning_in_urdu.pdfIn PDF document text
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_345f4f81cbaf474fb151cf9d0fc569de.pdf?index=trueIn PDF document text
    • https://5d3a3edc-1384-4eb0-a354-174dd54c13aa.filesusr.com/ugd/7f5dc5_359d367e170c4b05a9f1c15701c4a325.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/575989e5-b820-4281-ac9d-a9e0c8c58f1c/59912188513.pdfIn PDF document text
    • http://furovival.rf.gd/8613769600.pdfIn PDF document text
    • http://regigaxuwejizu.epizy.com/mapevozagavikubuk.pdfIn PDF document text
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_c9114775f47d448b8912a219e3025184.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/61192115638.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ae31dd3-22c1-4b7f-86f0-e8fbc8877281/troy_bilt_tb230_wont_start.pdfIn PDF document text
    • http://jodaniti.epizy.com/powasid.pdfIn PDF document text
    • http://litemulum.rf.gd/vujuvepupabolefozebumowiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5432ba12-9174-408d-b9b9-44691bfa58b4/33061928782.pdfIn PDF document text

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