Malicious PDF — malware analysis report

Static analysis result for SHA-256 89777655a26dd8da…

MALICIOUS

PDF

78.4 KB Created: 2021-03-15 17:06:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8522ee287ccb8721473b9e57c62f9651 SHA-1: 9321f65f74c7e63a096bcc2d8bbc160e43110855 SHA-256: 89777655a26dd8daecd5fc81e17df4f1837fa4393029f6cd098e4c4cbfe0267e
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 0.9998

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.
  • 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://botokaw.ru/aws?utm_term=remington+pole+saw+parts+near+me PDF link annotation
    • http://bojalusexob.iblogger.org/notatesorobif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wexukufedepim/94075570593.pdfIn PDF document text
    • http://punugituk.epizy.com/fender_twin_reverb_schematic.pdfIn PDF document text
    • https://083189c9-8220-4687-a375-57be19a37228.filesusr.com/ugd/909b15_01296e2e5fb047a1b0ac4c657c87f445.pdf?index=trueIn PDF document text
    • https://9170d309-caca-4186-8987-bf6b40ce219c.filesusr.com/ugd/baef12_0da501a6b60c4078a1540ff5d5a6036c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/excel_vba_current_date_format.pdfIn PDF document text
    • https://170a7d3c-74f0-42f5-9ead-98ae292a4922.filesusr.com/ugd/a18aa6_ec93b9e7f4614f48b5a0665ddb2de7ab.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mogipegi/vazakoborurikubegex.pdfIn PDF document text
    • http://duzixojaxop.rf.gd/sql_joins_interview_questions_and_answers.pdfIn PDF document text
    • https://ff743420-c5e2-4527-a456-70ddb2a1abd8.filesusr.com/ugd/5178f2_eaeca58391f74d47bcc274f7aa021a53.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lixuzo/rituzejizugiwanagezimoxo.pdfIn PDF document text
    • https://ecf8b3bd-8201-449f-a39c-156acd88681e.filesusr.com/ugd/97634b_fe529d0af3b243c78a28f8652089e3de.pdf?index=trueIn PDF document text
    • https://17673d3b-e5d0-4e0e-8211-f079fadf35f5.filesusr.com/ugd/13ae68_3a6d3c1116c84a3590cff12f8b29da93.pdf?index=trueIn PDF document text
    • https://368051e9-4199-40ea-b9a2-dc6e6f83cb3b.filesusr.com/ugd/6260fe_6be584fdb6a04de589e5bbd6adbd5c29.pdf?index=trueIn PDF document text
    • https://ed7c5604-ec0f-4ae6-9d22-6d534b57d154.filesusr.com/ugd/1d5a3f_a17a42bca4c14d64a04e0b6256040caa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/jurasofa.pdfIn PDF document text
    • https://425e2ee7-996f-4c6d-a593-b44a2a39b733.filesusr.com/ugd/bb05c1_ea7f0c8256044d009f0296ad579b8884.pdf?index=trueIn PDF document text
    • https://94e55d9a-ad7c-4b6b-a54a-a00202ad3087.filesusr.com/ugd/208fd7_01545cf229b549cca02c37428d6cedcf.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e78d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78D 5028 bytes
SHA-256: e30162f9b3752a73b3694c25b9dd12936886819d12afbed5dd1c76f3aca67c9a
font_01_sfnt_off0000f89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89D 10928 bytes
SHA-256: 34db4de1238216c8d38e421b38b8ec170d2c3d52bdefd016d486b67abfdcb076
font_02_sfnt_off00011e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E18 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

Open this report in the interactive analyzer, or submit your own file for analysis.