Malicious PDF — malware analysis report

Static analysis result for SHA-256 977dbda52e3a3531…

MALICIOUS

PDF

87.4 KB Created: 2021-03-17 09:03:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 97c8ae3677cc86f13492ec15c3683713 SHA-1: b1f1a37d26f010e0c8d96f72fb194546d39d0f71 SHA-256: 977dbda52e3a35310c1a5d7bfdf2c5f113f1da9a4e4edef1094e6e99825cab64
156 Risk Score

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 0.9985

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://golowaki.ru/wix?keyword=ap+world+history+teacher+websites PDF link annotation
    • http://mitisavad.getenjoyment.net/genug.pdfIn PDF document text
    • https://fanuwatesovize.weebly.com/uploads/1/3/1/3/131380837/ddbfe83a.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/dutazozukapodonotalep.pdfIn PDF document text
    • http://pinenud.mygamesonline.org/72487038804.pdfIn PDF document text
    • https://valexipeval.weebly.com/uploads/1/3/0/7/130775413/sisusamusetuso.pdfIn PDF document text
    • https://wofixoxabovu.weebly.com/uploads/1/3/4/5/134524794/15532e0820126d.pdfIn PDF document text
    • https://fisenekapiwu.weebly.com/uploads/1/3/1/4/131437930/nutiduga.pdfIn PDF document text
    • http://laluwaraselolar.mywebcommunity.org/beko_washing_machine_repair_manual.pdfIn PDF document text
    • http://nakalabaxis.mywebcommunity.org/31842549811.pdfIn PDF document text
    • http://pikejofopon.mypressonline.com/63281307544.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sojusenetuki.onlinewebshop.net/aufgaben_bruchrechnen.pdfIn PDF document text
    • https://s3.amazonaws.com/kubedukowug/how_to_guide_blind_person.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/management_reporting_system.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/50160941950.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/60th_birthday_invitation_templates_free.pdfIn PDF document text
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_07bcc82c4cca47899531612098232d34.pdf?index=trueIn PDF document text
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_dbe4a69998d049dfbe882ea1ab53f239.pdf?index=trueIn PDF document text
    • https://68420551-d949-41c4-975b-2ae86aa6d062.filesusr.com/ugd/09c3c7_db0793b45b62403ea9b3ce801dd0686e.pdf?index=trueIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_2244026518c94c2d83f508fcca0c2649.pdf?index=trueIn PDF document text
    • https://b998fa74-583e-446a-a2a7-67f41460fdb2.filesusr.com/ugd/e081f8_d4d753b4009f436a9d12a87e4299f0f5.pdf?index=trueIn PDF document text
    • https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_a75f313bffec497698ddd203457607f4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/mpdf_background_image_fit_page.pdfIn PDF document text
    • http://wetukanezin.atwebpages.com/bujulemagasav.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A2 5484 bytes
SHA-256: c2886b7bc4fc8d65f90f7ebba52fc49ae2fa5f06b82aa0e371de7c1440231bd5
font_01_sfnt_off00010845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10845 1716 bytes
SHA-256: d0f49cc195c1bf31025e9f0e2a1c0016543c567966f58b7536460b272fcd7c9a
font_02_sfnt_off000110d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D0 11632 bytes
SHA-256: 850f5d34bf3a7bf5ce4c1fb4a80bc77286ec72eb63f38627c594e2d839d9f24a
font_03_sfnt_off0001389a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1389A 16116 bytes
SHA-256: afbdbd02dec82d9be1e07df9ab92004d6e2996c86bdcb9c83a2c1f8ac0d08daa

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