Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bfde851cfb02486…

MALICIOUS

PDF

75.9 KB Created: 2021-03-05 07:40:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ee6c6d45ddc6988966568bc082d0975f SHA-1: 992402ede7a811d8b648dca1b7269861f329b4e3 SHA-256: 9bfde851cfb024867465df529a7d9c78f26f39cbf3f12373238c9dd7cbddcf3c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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
  • 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://xajibur.ru/wix?keyword=omf+com+offer+reviews PDF link annotation
    • https://cdn.sqhk.co/samumosoxivi/ifusgY6/kubojixax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411694/normal_60256c2fc5db9.pdfIn PDF document text
    • http://nutusugeralinet.mypressonline.com/maze_runner_characters_newt_real_name.pdfIn PDF document text
    • https://cdn.sqhk.co/zanemulazif/fic5jbM/37232716528.pdfIn PDF document text
    • http://sochi2026.com/ama_a_dios_grandemente_jovenes90wgy.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/35708460911.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408001/normal_603befba4c8e5.pdfIn PDF document text
    • http://sosuziba.mypressonline.com/linksys_ea6500_router_setup.pdfIn PDF document text
    • http://momsmall.space/african_languages_an_introductionlw8ca.pdfIn PDF document text
    • http://haustova.com/about_time_2013_soundtrackay1ld.pdfIn PDF document text
    • http://wowitaly.pro/xusabewemosajonosovi3u51u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486200/normal_6012e0578b275.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471690/normal_5fd0fa51f28cf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://488c2ff9-9ff4-499e-8f11-525115e20b22.filesusr.com/ugd/8aba0c_4ca5b20086e1439b89cf87c596186604.pdf?index=trueIn PDF document text
    • https://9f53eded-325d-4e02-8430-7c09bd872488.filesusr.com/ugd/e04405_0b6e6235eb9844c9842427c8b02264e3.pdf?index=trueIn PDF document text
    • https://13adc596-845f-4f4a-b539-e2c04a0a4b5a.filesusr.com/ugd/6e2da7_32ea2549879148f4b49df7b502b37523.pdf?index=trueIn PDF document text
    • http://zikoliduxa.atwebpages.com/rhyming_words_dictionary_free_download.pdfIn PDF document text
    • https://c809e8a6-5bdf-489d-8d8c-df4e4638a115.filesusr.com/ugd/45a296_6e4bc1dca27c456a9695e63c9dac9dfe.pdf?index=trueIn PDF document text
    • https://e26976e3-f089-44cc-a2a6-54bcc6cae308.filesusr.com/ugd/0df15e_063c8576a3c54c7ea9a22906deed16a3.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED78 4964 bytes
SHA-256: 515ca6070d1d215b8f5a0f4e8ee110319dba03a37c121ef778e28f7a6451be76
font_01_sfnt_off0000fe62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE62 10696 bytes
SHA-256: c9397ae76e6b49f6b47f4bd54e3fc19acffc8049c98bb15241e26bf576bf8bcf

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