Malicious PDF — malware analysis report

Static analysis result for SHA-256 99ae7a0986c3f9de…

MALICIOUS

PDF

81.4 KB Created: 2021-03-16 23:00:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 56a0aced8e6649d1e57a525afaee2e58 SHA-1: 5e7c849388edadf62aa361bfc9d47894fd43718a SHA-256: 99ae7a0986c3f9de06dd28140431b822b2c7b9a377fc1c3f776a1d47cb203a60
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, indicating a link farm designed to redirect users to malicious content. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic point to a phishing or drive-by download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://pelibifir.ru/wix?keyword=enamel+tea+kettle+made+in+usa PDF link annotation
    • http://citimart.online/physical_healthcare_of_mental_health_consumers_guidelines0xtt3.pdfIn PDF document text
    • http://vuzosemeve.22web.org/hdfs_dfs_command_cheat_sheet.pdfIn PDF document text
    • http://mazikopipovix.mywebcommunity.org/25293045137.pdfIn PDF document text
    • http://zemesod.getenjoyment.net/fevamopukemex.pdfIn PDF document text
    • http://doctorzlo.com/togujidegalisuj5y9gq.pdfIn PDF document text
    • http://mybatut.store/84200049034imt9k.pdfIn PDF document text
    • http://fito4ka.xyz/95256514371ba5gw.pdfIn PDF document text
    • http://soldonlittleton.com/leluzadefurelipafapajhevhd.pdfIn PDF document text
    • http://vipmanmarket.space/jasazebiboxozedkbw9.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/tixedujegibex/15042291216.pdfIn PDF document text
    • https://fb5b3b17-6e6a-47c5-ae49-26eddba71e57.filesusr.com/ugd/aff7be_95d976185c5646b4b32656d2163d282d.pdf?index=trueIn PDF document text
    • http://ropasibemufi.epizy.com/zanivorifimalonoleseminu.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/gumudomatadolog.pdfIn PDF document text
    • https://a79fbd7c-12a6-44fe-9d3c-43dc2b0795a8.filesusr.com/ugd/f95141_f45a149d8e8142f2aba7f5bf6172db38.pdf?index=trueIn PDF document text
    • http://muwuvago.atwebpages.com/robot_vacuum_cleaner_reviews_uk.pdfIn PDF document text
    • http://jonukufazok.rf.gd/96201751230.pdfIn PDF document text
    • http://zogivumomu.epizy.com/50555714786.pdfIn PDF document text
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_790582c81f9843e6899c0dcbea00804b.pdf?index=trueIn PDF document text
    • https://03aaa7dd-6608-466c-a68c-f41c59811c05.filesusr.com/ugd/ae15ca_c902d81c35f0408ba53ad4e1d7de16f6.pdf?index=trueIn PDF document text
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_9e7e07db58144c3cad37ab27087ee4c4.pdf?index=trueIn PDF document text
    • http://ditanumugagoma.myartsonline.com/adobe_reader_apk_file.pdfIn PDF document text
    • http://mivajale.rf.gd/3617806870.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_off00010258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10258 4896 bytes
SHA-256: 579f51d83b037241899d8db4778e61b8f624e6537e84bb5094af0d377a92b162
font_01_sfnt_off000112f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F3 10880 bytes
SHA-256: 377934489a03a79436e2848f8f65a45f83547a862b1f615e6ffc59c0a75fe459

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