Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5fda629cffd25ae…

MALICIOUS

PDF

75.3 KB Created: 2021-03-14 15:59:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 63cac1e3519e1562fa4d2120c6703c0f SHA-1: 4d52f57f039935bb9a66e86035d3158508f70c5e SHA-256: e5fda629cffd25aedb12c9832b57785d15f8014163e68f7e768544cecbc9e853
96 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, with one prominent URL pointing to a potentially malicious domain. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the structure suggests an attempt to redirect users to external resources, possibly for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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://nipisod.ru/wix?keyword=head+girl+of+hufflepuff PDF link annotation
    • http://xatakafigudu.getenjoyment.net/49519121060.pdfIn PDF document text
    • http://topplafond.xyz/chrysler_pt_cruiser_service_manual9z1f9.pdfIn PDF document text
    • http://muzoc.xyz/mokegemepmcxx.pdfIn PDF document text
    • http://totalcreditreport.info/how_to_web_design_and_developmentfoent.pdfIn PDF document text
    • http://mepamoso.sportsontheweb.net/84502336827.pdfIn PDF document text
    • http://jefevivavifax.scienceontheweb.net/molilevipimuv.pdfIn PDF document text
    • http://br1.red/sample_performance_evaluation_phrases_for_employees7o8tr.pdfIn PDF document text
    • http://vetovikaxu.mypressonline.com/zixijekewuvamuwarolonuge.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/bajapovogam/86278072087.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/antivirus_android_security_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/bolt_report_ratings_2017.pdfIn PDF document text
    • https://e6c529cc-411f-4195-b5ea-7b5fd081490a.filesusr.com/ugd/b7ab08_1c06e93559eb4257b692a6c504e1959d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wovitiku/10754652127.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/codename_villanelle_book_3.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/power_of_attorney_template_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/caddo_parish_clerk_of_court_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/video_helper_firefox_alternative.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/pijar.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/rilewaj.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/free_mathematica_9_software_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/annelids_hack_apk_1._113._7.pdfIn PDF document text
    • https://409b2d23-5c1d-402e-97df-26c0da9299b0.filesusr.com/ugd/2e3d42_ecf5b74991ee4829aacf21c51e8319b6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/48009214037.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/iccid_number_on_android.pdfIn PDF document text
    • https://089130c0-62ae-4bf1-a93c-656440fe8451.filesusr.com/ugd/738632_e4711d382a5a4eb1ac8a0e706de0e6c2.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_off0000e9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E6 5088 bytes
SHA-256: 4359316a15ab1b5d19b10fdda0bb2a00f4ecd3008db90fa9447ffd9da27e031d
font_01_sfnt_off0000fb2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2E 10732 bytes
SHA-256: 11e806d825ee10f47c9f110f006e3e77f3088be7ee41c72cf3697cbefe8c0604

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