Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0fd1953c76263e1…

MALICIOUS

PDF

78.7 KB Created: 2021-03-06 21:30:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 34994bc77c5a16eb938b5fa338fa62e7 SHA-1: c031b32d6a7c87cbdcdf09ba789ff5ad3f996705 SHA-256: f0fd1953c76263e13c22b913b38023378cb0f9d8348ef2517a6621a3118efb94
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://midufefew.ru/wix?keyword=violin+open+strings+exercises PDF link annotation
    • https://vudefuzafovafid.weebly.com/uploads/1/3/4/6/134630521/3277643.pdfIn PDF document text
    • http://serovakarara.mygamesonline.org/bob_evans_nutrition_everything_breakfast.pdfIn PDF document text
    • https://zokibiruxe.weebly.com/uploads/1/3/5/3/135326092/liwiwamesovin-giwebuzix-suvawovolo-wukulat.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/5749521932.pdfIn PDF document text
    • https://boboxike.weebly.com/uploads/1/3/2/7/132710801/1684577.pdfIn PDF document text
    • http://setopin.mypressonline.com/advance_math_formula_in_hindi.pdfIn PDF document text
    • https://sofofiwolasaxu.weebly.com/uploads/1/3/1/8/131856039/01189f453c9c3.pdfIn PDF document text
    • http://keniworu.mywebcommunity.org/wawaraxekoxubaged.pdfIn PDF document text
    • https://gipazekafasulal.weebly.com/uploads/1/3/4/6/134600210/vemoduvulijedawoxavo.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/mozedijiz/personal_leadership_development_plan_essay.pdfIn PDF document text
    • https://cdfb6f36-dde2-4af5-b3b7-55ff39976061.filesusr.com/ugd/c6ac46_c9aee63d3d8343e296b1355cf59daaa9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/faxiwowedibavo.pdfIn PDF document text
    • https://35548484-ce42-4b18-9d9d-834326683263.filesusr.com/ugd/a221b6_26c1303e223a48a98ebdf31bc337257e.pdf?index=trueIn PDF document text
    • https://72cdfa97-b5fe-44cc-9aa9-3142b5aa642a.filesusr.com/ugd/ee32c9_2879099e03094654899383bb80c441c7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/filut.pdfIn PDF document text
    • https://6a9ecc2b-05c3-4056-8705-773ae6be8cdd.filesusr.com/ugd/7a359d_8e016415d98b415d861afe72476d80a2.pdf?index=trueIn PDF document text
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_6d506065de5348168fbfed294110b125.pdf?index=trueIn PDF document text
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_5d0789a90d7d430db2eb6f3065bd053c.pdf?index=trueIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_39b8cc2c2cdb4e2f8bb5e884a80ef763.pdf?index=trueIn PDF document text
    • https://28481333-1ef2-46fb-8ebf-d56c3f24acbc.filesusr.com/ugd/314c35_a1b4fcb372624ad48796634bcc4d7503.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bulozor/11222483325.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/the_secrets_we_keep_movie_where_to_watch.pdfIn PDF document text
    • https://7605c768-a471-4169-85a9-0dab509fd250.filesusr.com/ugd/20ab23_22511a7c395e4dfd91ff1105282b669e.pdf?index=trueIn PDF document text
    • https://30cc9e9c-6145-4029-bfdc-d0561bdb3a10.filesusr.com/ugd/0dcf4b_567c7f0098784ea893cc04c0b9b8dc41.pdf?index=trueIn PDF document text
    • https://30c74dc1-c3f2-4e71-8253-1ec84f3b94e1.filesusr.com/ugd/b8c6fa_82091c132aef4431be909bb625ae7632.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_off0000f9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D0 4924 bytes
SHA-256: a319e3f016f8c01b8a2f811615005faa9ef0d18ce88b157f22428fe01c98ac5a
font_01_sfnt_off00010ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB0 10148 bytes
SHA-256: 96ad38bc83c2f0827c467760c9c02bab9646ed890244bd0f6a9226fce678db0d

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