Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e38b7ebcaf340ba…

MALICIOUS

PDF

80.8 KB Created: 2021-04-22 22:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c6be9dbdf1f95c378da0ffc3267c980e SHA-1: 71f6290a17db65861bd4f3e4b4868fcc5b98d1a6 SHA-256: 5e38b7ebcaf340ba67f2f13914fcc6e5374470f4d7b1a45393829e2a69f957e4
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9996

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://jacksth.ru/strik?utm_term=dewalt+20-volt+max+power+tool+battery+charger PDF link annotation
    • http://fastgetme.online/88314647737fd8h5.pdfIn PDF document text
    • http://pocki.top/asfa_guidelines_for_therapeutic_apheresis_2016525uy.pdfIn PDF document text
    • http://operationhomeplate.com/24654973702g1gjw.pdfIn PDF document text
    • http://it50discount.pro/82585674052s1pkd.pdfIn PDF document text
    • http://hangookoil.ru/does_blood_pressure_rise_in_late_pregnancy2bo0t.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/kovilowab/google_play_service_error_android_lollipop.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/karma_police_piano_sheet_free.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/casio_g-shock_ga-100mb-1a_military_black.pdfIn PDF document text
    • http://zuvaxazalafes.epizy.com/movies_free_online_without_signing_up.pdfIn PDF document text
    • http://susudovafe.epizy.com/vutafux.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/70676035451.pdfIn PDF document text
    • https://44879a12-c10a-431c-a98a-7de142752d0f.filesusr.com/ugd/bb4607_f8709c2d91244b71b6c0c201367b657b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/watermelon_sugar_book.pdfIn PDF document text
    • https://f3ea461b-95fd-44cf-949c-5afda193840f.filesusr.com/ugd/a48928_1acf45e2dd994cc4a9f5056ef6bc2dea.pdf?index=trueIn PDF document text
    • https://86cafecd-0af7-43e6-b578-14605c742a6c.filesusr.com/ugd/c4ddd0_a9875ba887404419b9457ad8aec889e8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/20752188249.pdfIn PDF document text
    • https://b23ebcb4-2e41-4c68-a408-584c84124782.filesusr.com/ugd/5a2446_83d60cb41eb7479b97a3b898aefbf4ec.pdf?index=trueIn PDF document text
    • https://e510c2d5-567e-4a96-89ff-abc18316baf7.filesusr.com/ugd/8a9bcc_f3cbbdb198904d01932b3d36ecefeb97.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/ejercicios_resueltos_teorema_de_moivre.pdfIn PDF document text
    • http://nemabevuvuxale.rf.gd/jegamovajenujobad.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/zewapoxisasa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0E 5572 bytes
SHA-256: 446252169733da325d780a6edef17ac9ef94bb075cb7139a6e4c380464257d44
font_01_sfnt_off0001012b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012B 11244 bytes
SHA-256: b02131ace5ec1a05f67b76987102c40f3e64c00cca3abc39d01e9fd89a6a6f85
font_02_sfnt_off00012776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12776 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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