Malicious PDF — malware analysis report

Static analysis result for SHA-256 2883ecd759d35813…

MALICIOUS

PDF

74.1 KB Created: 2021-03-13 13:36:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dd7ae03f32848ca5a78c3ece99f2becf SHA-1: 5f0a68217f879f73a747ffd700dd059225b25966 SHA-256: 2883ecd759d358135352b7a759e5210d2156f827deb78aa5e7cf2ac5235644e7
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9997

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://druttle.ru/123?utm_term=dosage+forms+of+diazepam PDF link annotation
    • https://rojabufofunos.weebly.com/uploads/1/3/0/7/130776514/7b96fad7cbba5a.pdfIn PDF document text
    • https://wumasokur.weebly.com/uploads/1/3/1/3/131384536/kifenefaw.pdfIn PDF document text
    • https://visumosibe.weebly.com/uploads/1/3/0/8/130814065/vaveju_xegokomaguluba.pdfIn PDF document text
    • https://kilekefaze.weebly.com/uploads/1/3/4/6/134631798/9b749.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/74492356409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21161d42-c84a-4812-b5ef-afea51e48fb5/under_the_dome_full_movie_tamil_dubbed_watch_online.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/gaas_audit_report_example.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/filebeat_logstash_elasticsearch_template.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/risk_management_policy_statement.pdfIn PDF document text
    • https://40e214c1-1950-44e8-a195-e2c6eeb23253.filesusr.com/ugd/a517f4_85324626c95c470d9cbfd12eb4ea1a60.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rimepusox/galaso.pdfIn PDF document text
    • https://cef8af8d-7071-4339-ac50-fc417d371010.filesusr.com/ugd/a89196_d4aa2372e678481cacb720508754dd35.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d208420-2118-445c-88e3-25e50291ad57/36441997142.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/56899846625.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62122e6a-be21-446b-8974-3e3aaf81700f/gugodamixiniwikipexedax.pdfIn PDF document text
    • https://e8b83640-91e4-44a0-a69f-c2468797902f.filesusr.com/ugd/ee4a13_9c818a6e91054d3996dbea9b043b2bac.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4c46f51-e2b5-4a79-9f5a-44babad8f69c/67240339316.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92303501-3e9f-40ee-a89f-23fd1be2fb68/26567485842.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85776232-617f-4a9b-a246-2094cb04427a/20432074613.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93e5a780-1c9a-4afd-aa18-c499f764e579/81053274953.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C3 5376 bytes
SHA-256: 96db0460bfc9974b15f04b873e4da08073080c7c5336e1c8fa8d1611678aeede
font_01_sfnt_off0000f80c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80C 10272 bytes
SHA-256: 41e58c2bfb3f5e35182c0c2f88bbba4ce9e8a3ffe6df4a3b64f34bb124aac27f

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